Chen Hao cannot choose between two phones. Xiaoyu pushes him towards the cheaper one.
Chen Hao
这两个手机，你觉得哪个好？
Zhè liǎng gè shǒujī, nǐ juéde nǎ gè hǎo ?
These two phones, which do you think is better?
Xiaoyu
左边这个比右边的贵一千块。
Zuǒbian zhè gè bǐ yòubian de guì yīqiān kuài.
The one on the left is a thousand yuan dearer than the one on the right.
Chen Hao
贵的大一些，拍的照片也更清楚。
Guì de dà yīxiē, pāi de zhàopiàn yě gèng qīngchu.
The dear one is a bit bigger, and it takes sharper photographs.
Xiaoyu
你不常拍照片，用得久更重要。
Nǐ bù cháng pāi zhàopiàn, yòng de jiǔ gèng zhòngyào.
You hardly ever take photographs; lasting a long time matters more.
Chen Hao
售货员说便宜的那个能用两天。
Shòuhuòyuán shuō piányi de nà gè néng yòng liǎng tiān.
The assistant says the cheap one lasts two days.
Xiaoyu
那它比贵的还好。
Nà tā bǐ guì de hái hǎo.
Then it is even better than the dear one.
Chen Hao
不过它没有贵的那么快。
Bùguò tā méiyǒu guì de nàme kuài.
But it is not as fast as the dear one.
Xiaoyu
我只用它打电话和看新闻，够了。
Wǒ zhī yòng tā dǎdiànhuà hé kàn xīnwén, gòu le.
I only use mine for calls and reading the news, that is quite enough.
Chen Hao
也对。我就买便宜的那个吧。
Yě duì. Wǒ jiù mǎi piányi de nà gè ba.
You are right. I will buy the cheaper one.
Xiaoyu
你先问一下能不能再便宜一点儿。
Nǐ xiān wèn yīxià néng bùnéng zài piányi yīdiǎnr.
Ask first whether they can knock a bit more off.
Chen Hao
好，我去问。
Hǎo, wǒ qù wèn.
Right, I will go and ask.
To say one thing is worse than another, Chinese does not negate 比: 这个不比那个快 means "no faster", that is to say much the same, not "slower". Inferiority is expressed with 没有: 它没有贵的那么快, it is not as fast as the dear one. 那么 is optional but very common.
更 simply strengthens: 更重要, more important still. 还 pushes beyond what was expected, often with a touch of surprise: 比贵的还好, better than the dear one, which you would not have thought. Both go before the adjective, and neither 很 nor 太 is written into a comparison: 比这个很贵 is a mistake.
得 after the verb introduces the judgement: 用得久, it lasts a long time in use; 拍得清楚, it photographs sharply; 跑得快, it runs fast. Chinese judges the action itself, where English gives the object a quality, "it has good battery life". Learning the turn of phrase saves you the technical vocabulary, which is out of reach at this level.
