化石通常在大浴池中进行现场清洗，这可以使水和现代 DNA 形式的污染物渗透到多孔骨骼中。

Fossils are often washed together on-site in a large bath which can allow water and contaminants in the form of contemporary DNA to permeate into the porous bones.

youdao

youdao

youdao

So I realize that this was among a more childish demonstrations that I could come up with to illustrate this point.

我意识到这个一个很幼稚的演示,我可以举例来说明这一点。

哈佛公开课 - 计算机科学课程节选

And you want this to continue. And then when you get older and you realize what the museum is about,

你希望这可以延续。当你长大了，你就意识到博物馆是关于什么的，

美国的博物馆教育 - SpeakingMax英语口语达人

When you look at a food label like this, first it shows you the number of servings on containers.

这是一个食品标签的样例,首先可以了解到整个包装内所含食物份数

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选