一升茶树含有高达9毫克的氟化物，过量会导致氟骨症，降低骨骼质量，导致疼痛和韧带僵硬。

A litre of teacan contain up to 9mg of fluoride, which in excess can cause skeletal fluorosis, reducing bone quality and causing pain and stiffening of the ligaments.

youdao

在此前的推测中，每一升海水中可能会有大约10万个微生物细胞，但现在科学家们认为有可能达到10亿个。

Previously it was thought there were around 100, 000 microbial cells in every litre of seawater but scientists now think there could be one billion.

youdao

从经济学的角度来看，为了应对负外部性，原则上应该征收的税收是准确的：对一升燃料征收的税应该等于使用一升燃料所造成的危害。

Economics is precise about the tax that should, in principle, be levied to deal with negative externalities: the tax on a liter of fuel should be equal to the harm caused by using a liter of fuel.

youdao

One of the things about Princeton is that in your senior year,

普林斯顿有这么一桩事，你升上大三之后，

我尊敬的教授 - SpeakingMax英语口语达人

He brings his opening note, that F-sharp, in a beat early.

他把他的起始音,升F,提前一拍

耶鲁公开课 - 聆听音乐课程节选