下 xià down / downwards / below / lower / later / next (week etc) / second (of two parts) / to decline / to go down / to arrive at (a decision, conclusion etc) / measure word to show the frequency of an action syn 帧频 幀頻 zhēn pín frame rate / frame frequency 音频 音頻 yīn pín audio / sound / audio frequency / sound frequency syn 高频 高頻 gāo pín high frequency syn 变频器 變頻器 biàn pín qì frequency converter / frequency changer / inverter 变频 變頻 biàn pín frequency conversion 调频 調頻 tiáo pín frequency modulation / FM 射频 射頻 shè pín radio frequency (RF) 频段 頻段 pín duàn (radio) band / frequency band syn 低频 低頻 dī pín low frequency 频谱 頻譜 pín pǔ frequency spectrum / spectrum / spectrogram syn 次之 cì zhī to rank second (in terms of some attribute: size, frequency, quality etc) syn 谐波 諧波 xié bō harmonic (wave with frequency an integer multiple of the fundamental) 赫兹 赫茲 hè zī hertz (Hz), unit of frequency 频带 頻帶 pín dài frequency range / bandwidth syn 分频 分頻 fēn pín frequency sharing / subdivision of radio waveband 中波 zhōng bō medium wave (radio frequency range) 声频 聲頻 shēng pín audio frequency 超高频 超高頻 chāo gāo pín super high frequency 甚高频 甚高頻 shèn gāo pín very high frequency (VHF) 工频 工頻 gōng pín utility frequency / power frequency / mains frequency 奈奎斯特频率 奈奎斯特頻率 nài kuí sī tè pín lǜ Nyquist frequency / turnover frequency 区域低中频广播协定 Regional Agreement on Low Frequency and Medium Frequency Broadcasting 倍频器 倍頻器 bèi pín qì frequency multiplier 词频效应 詞頻效應 cí pín xiào yìng word frequency effect (psych.) 单元频率 單元頻率 dān yuán pín lǜ unit frequency 邻近词频率效果 鄰近詞頻率效果 lín jìn cí pín lǜ xiào guǒ neighborhood frequency effect 射频噪声 射頻噪聲 shè pín zào shēng radio frequency noise 角频率 角頻率 jiǎo pín lǜ angular frequency 跳频 跳頻 tiào pín frequency-hopping spread spectrum 基谐波 基諧波 jī xié bō fundamental frequency / base harmonic 基频 基頻 jī pín fundamental frequency 射频识别 射頻識別 shè pín shí bié radio-frequency identification (RFID) 振频 振頻 zhèn pín frequency of vibration 数字分频 數字分頻 shù zì fēn pín digital frequency sharing 波数 波數 bō shù wave number (reciprocal of frequency) 无线电收发机 無線電收發機 wú xiàn diàn shōu fā jī transceiver / radio frequency receiver, broadcaster or relay 词频 詞頻 cí pín word frequency 载频 載頻 zài pín frequency of carrier wave 速调管 速調管 sù tiáo guǎn klystron (electronic tube used to produce high frequency radio waves) 重码词频 重碼詞頻 chóng mǎ cí pín frequency of coincident codes 频数分布 頻數分佈 pín shù fēn bù frequency distribution 频率合成 頻率合成 pín lǜ hé chéng frequency synthesis 频率调制 頻率調製 pín lǜ tiáo zhì frequency modulation 甚低频 甚低頻 shén dī pín very low frequency 自动频率控制 automatic frequency control 频率过滤 frequency filtering 备用频率 alternate frequency 高频自动回询重发 high-frequency automatic request 频移键控 pín yí jiàn kòng frequency-shift-keying 频率跟踪 frequency tracking 频率分辨率 frequency resolution 抗欺骗频率 spoofing-secure frequency 低频主动声纳 低頻主動聲納 dī pín zhǔ dòng shēng nà low frequency active sonar 极低频电磁场 極低頻電磁場 jí dī pín diàn cí chǎng extremely low frequency electromagnetic fields 取样频率 取樣頻率 sampling frequency 厘米波 lí mǐ bō super high frequency 漫顶频率 overtopping frequency 高频设备 高頻設備 gāo pín shè bèi high frequency equipment 雨强-历时-频率曲线 雨強-歷時-頻率曲線 Intensity Duration Frequency curve / IDF curve IDF曲线 IDF曲線 Intensity Duration Frequency curve / IDF curve 频分复用 頻分複用 frequency division multiplexing 行动区频率管理单元 行動區頻率管理單元 theater frequency management cell 跳频无线电 跳頻無線電 tiào pín wú xiàn diàn frequency-hopping radio / hopping radio / FH radio 海底详细绘图高频地震系统 海底詳細繪圖高頻地震系統 High frequency seismic system for detailed mapping of sea floor 频率响应函数 頻率響應函數 frequency response function 覆盖频率 覆蓋頻率 coverage frequency 多频率勘探系统 多頻率勘探系統 multi-frequency exploration system 频率计和功率计 頻率計和功率計 frequency counter and power meter 相对频数 相對頻數 relative frequency 射频协调研究小组 射頻協調研究小組 Study Group on Radio-frequency Coordination 频率计划 頻率計劃 Frequency Plan 电信联盟世界高频广播无线电行政会议 電信聯盟世界高頻廣播無線電行政會議 ITU World Administrative High Frequency Broadcasting Radio Conference 分段频率 分段頻率 stepped frequency 频分多址 頻分多址 frequency division multiple access 有限频度不通知的接触 有限頻度不通知的接觸 limited frequency unannounced access 频率管理系统 頻率管理系統 Frequency Management System 