柠檬酸 檸檬酸 níng méng suān citric acid 甲酸 jiǎ suān formylic acid (HCOOH) / formic acid / methanoic acid 氢卤酸 氫鹵酸 qīng lǔ suān hydrohalic acid (e.g. hydrofluoric acid HF 氫氟酸|氢氟酸[qing1 fu2 suan1], hydrochloric acid HCl 鹽酸|盐酸[yan2 suan1] etc) 废酸 廢酸 fèi suān spent acid / sludge acid / waste acid 甲子 jiǎ zǐ first year of the sixty-year cycle (where each year is numbered with one of the 10 heavenly stems 天干[tian1 gan1] and one of the 12 earthly branches 地支[di4 zhi1]) / the sixty-year cycle 水循环 水循環 shuǐ xún huán water cycle / hydrologic cycle 周速 zhōu sù cycle time / cycle speed 生活史 shēng huó shǐ life cycle / biological cycle 寿命周期分析 life cycle assessment / life cycle analysis 水分循环 water cycle / hydrologic cycle 威尔逊旋回 Wilson cycle / ocean cycle 起飞着陆循环 起飛著陸循環 landing and take-off cycle / LTO cycle 生活周期 shēng huó zhōu qī life cycle / biological cycle 变现周期 變現周期 cash conversion cycle / cash cycle 核酸 hé suān nucleic acid / (coll.) nucleic acid test (abbr. for 核酸檢測|核酸检测[he2suan1 jian3ce4]) 乙酸 yǐ suān acetic acid (CH3COOH) / ethanoic acid syn 烟酸 煙酸 yān suān niacin (vitamin B3) / 3-Pyridinecarboxylic acid C6H5NO2 / nicotinic acid syn 谷氨酸 穀氨酸 gǔ ān suān glutamic acid (Glu), an amino acid 二甲基胂酸 èr jiǎ jī shèn suān dimethylarsenic acid (CH3)2AsO2H / cacodylic acid 二甲基砷酸 èr jiǎ jī shēn suān dimethylarsenic acid (CH3)2AsO2H / cacodylic acid 天冬氨酸 tiān dōng ān suān aspartic acid (Asp), an amino acid 泛酸 fàn suān pantothenic acid / vitamin B5 / to surge up (of acid in the stomach) 烟碱酸 煙鹼酸 yān jiǎn suān niacin (vitamin B3) / nicotinic acid / Pyridine-3-carboxylic acid C6H5NO2 菸碱酸 菸鹼酸 yān jiǎn suān niacin (vitamin B3) / 3-Pyridinecarboxylic acid C6H5NO2 / nicotinic acid 循环 循環 xún huán to cycle / to circulate / circle / loop syn 一周 yī zhōu one week / all the way around / a whole cycle 周期 週期 zhōu qī period / cycle 赛车 賽車 sài chē auto race / cycle race / race car syn 轮回 輪迴 lún huí to reincarnate / reincarnation (Buddhism) / (of the seasons etc) to follow each other cyclically / cycle / CL:個|个[ge4] syn 人道 rén dào human sympathy / humanitarianism / humane / the "human way", one of the stages in the cycle of reincarnation (Buddhism) / sexual intercourse syn 排量 pái liàng discharge volume / engine capacity / engine displacement (volume of air fuel mixture drawn in during one cycle) 生命周期 生命週期 shēng mìng zhōu qī life cycle 乙酉 yǐ yǒu twenty-second year B10 of the 60 year cycle, e.g. 2005 or 2065 周而复始 週而復始 zhōu ér fù shǐ lit. the cycle comes back to the start (idiom) / to move in circles / the wheel comes full circle syn 丙戌 bǐng xū twenty-third year C11 of the 60 year cycle, e.g. 2006 or 2066 甲午 jiǎ wǔ thirty-first year A7 of the 60 year cycle, e.g. 1954 or 2014 套数 套數 tào shù song cycle in Chinese opera / (fig.) a series of tricks / polite remarks / number of (things that are counted in 套[tao4], like houses) syn 戊戌 wù xū thirty-fifth year E11 of the 60 year cycle, e.g. 1958 or 2018 本命年 běn mìng nián year of one's birth sign, according to the cycle of 12 animals of the earthly branches 地支[di4 zhi1] 安全期 ān quán qī safe period / safe days of a woman's menstrual cycle (low risk of conception) 赛车场 賽車場 sài chē chǎng motor racetrack / cycle racetrack 转轮 轉輪 zhuàn lún rotating disk / wheel / rotor / cycle of reincarnation in Buddhism 甲申 jiǎ shēn 21st year A9 of the 60 year cycle, e.g. 2004 or 2064 庚子 gēng zǐ 37th year G1 of the 60-year cycle, e.g. 1960 or 2020 辛亥 xīn hài forty-eighth year H12 of the 60 year cycle, e.g. 1971 or 2031 / cf 辛亥革命[Xin1 hai4 Ge2 ming4], Xinhai Revolution of 1911 花甲 huā jiǎ complete sexagenary cycle / a 60 year-old person / passage of time 干支 gān zhī the ten Heavenly Stems 十天干[shi2 tian1 gan1] and twelve earthly branches 十二枝 / sexagenary cycle 庚辰 gēng chén seventeenth year G5 of the 60 year cycle, e.g. 2000 or 2060 丁卯 dīng mǎo fourth year D4 of the 60 year cycle, e.g. 1987 or 2047 壬午 rén wǔ nineteenth year I7 of the 60 year cycle, e.g. 2002 or 2062 甲戌 jiǎ xū eleventh year A11 of the 60 year cycle, e.g. 1994 or 2054 辛酉 xīn yǒu fifty-eighth year H10 of the 60 year cycle, e.g. 1981 or 2041 丙子 bǐng zǐ thirteenth year C1 of the 60 year cycle, e.g. 1996 or 2056 壬申 rén shēn ninth year I9 of the 60 year cycle, e.g. 1992 or 2052 属相 屬相 shǔ xiàng colloquial term for 生肖[sheng1 xiao4] the animals associated with the years of a 12-year cycle syn 庚午 gēng wǔ seventh year G7 of the 60 year cycle, e.g. 1990 or 2050 癸未 guǐ wèi twentieth year J8 of the 60 year cycle, e.g. 2003 or 2063 戊辰 wù chén fifth year E5 of the 60 year cycle, e.g. 1988 or 2048 庚申 gēng shēn fifty-seventh year G9 of the 60 year cycle, e.g. 1980 or 2040 丁丑 dīng chǒu fourteenth year D2 of the 60 year cycle, e.g. 1997 or 2057 戊寅 wù yín fifteenth year E3 of the 60 year cycle, e.g. 1998 or 2058 丙寅 bǐng yín third year C3 of the 60 year cycle, e.g. 1986 or 2046 甲寅 jiǎ yín 51st year A3 of the 60 year cycle, e.g. 1974 or 2034 辛未 xīn wèi eight year H8 of the 60 year cycle, e.g. 1991 or 2051 己卯 jǐ mǎo sixteenth year F4 of the 60 year cycle, e.g. 1999 or 2059 辛丑 xīn chǒu thirty-eighth year H2 of the 60 year cycle, e.g. 1961 or 2021 / cf 辛丑條約|辛丑条约, Protocol of Beijing of 1901 ending the 8-nation intervention after the Boxer uprising 壬戌 rén xū fifty-ninth year I11 of the 60 year cycle, e.g. 1982 or 2042 癸亥 guǐ hài sixtieth year J12 of the 60 year cycle, e.g. 1983 or 2043 癸酉 guǐ yǒu tenth year J10 of the 60 year cycle, e.g. 1993 or 2053 戊午 wù wǔ fifty-fifth year E7 of the 60 year cycle, e.g. 1978 or 2038 丁亥 dīng hài twenty-fourth year D12 of the 60 year cycle, e.g. 2007 or 2067 辛巳 xīn sì eighteenth year H6 of the 60 year cycle, e.g. 2001 or 2061 己巳 jǐ sì sixth year F6 of the 60 year cycle, e.g. 1989 or 2049 乙亥 yǐ hài twelfth year B12 of the 60 year cycle, e.g. 1995 or 2055 甲辰 jiǎ chén 41st year A5 of the 60 year cycle, e.g. 1964 or 2024 丙辰 bǐng chén fifty-third year C5 of the 60 year cycle, e.g. 1976 or 2036 庚寅 gēng yín twenty-seventh year G3 of the 60 year cycle, e.g. 2010 or 2070 乙丑 yǐ chǒu second year B2 of the 60 year cycle, e.g. 1985 or 2045 乙卯 yǐ mǎo fifty-second year B4 of the 60 year cycle, e.g. 1975 or 2035 丙午 bǐng wǔ forty-third year C7 of the 60 year cycle, e.g. 1966 or 2026 庚戌 gēng xū forty-seventh year G11 of the 60 year cycle, e.g. 1970 or 2030 己未 jǐ wèi fifty-sixth year F8 of the 60 year cycle, e.g. 1979 or 2039 戊子 wù zǐ twenty-fifth year E1 of the 60 year cycle, e.g. 2008 or 2068 丁巳 dīng sì fifty-fourth year D6 of the 60 year cycle, e.g. 1977 or 2037 癸丑 guǐ chǒu fiftieth year J2 of the 60 year cycle, e.g. 1973 or 2033 乙未 yǐ wèi thirty-second year B8 of the 60 year cycle, e.g. 1955 or 2015 壬辰 rén chén twenty-ninth year I5 of the 60 year cycle, e.g. 2012 or 2072 壬子 rén zǐ forty-ninth year I1 of the 60 year cycle, e.g. 1972 or 2032 丙申 bǐng shēn thirty-third year C9 of the 60 year cycle, e.g. 1956 or 2016 戊申 wù shēn forty-fifth year E9 of the 60 year cycle, e.g. 1968 or 2028 己丑 jǐ chǒu twenty-sixth year F2 of the 60 year cycle, e.g. 2009 or 2069 乙巳 yǐ sì forty-second year B6 of the 60 year cycle, e.g. 1965 or 2025 辛卯 xīn mǎo twenty-eighth year H4 of the 60 year cycle, e.g. 2011 or 2071 己酉 jǐ yǒu forty-sixth year F10 of the 60 year cycle, e.g. 1969 or 2029 癸卯 guǐ mǎo fortieth year J4 of the 60 year cycle, e.g. 1963 or 2023 经济周期 經濟週期 jīng jì zhōu qī economic cycle 癸巳 guǐ sì thirtieth year J6 of the 60 year cycle, e.g. 2013 or 2073 己亥 jǐ hài thirty-sixth year F12 of the 60 year cycle, e.g. 1959 or 2019 壬寅 rén yín thirty-ninth year I3 of the 60 year cycle, e.g. 1962 or 2022 