One argument which is often raised is that if a professor tries his hand at a new topic, he will be unable to train new Ph. D.s in this new area, thus limiting our ability to produce more Ph.

其中一个经常拿出来说事的论点是：如果教授腾出手来尝试一个新的主题，他是不能带这个新领域中的博士生的，那么我们生产博士生的能力就下降了。

youdao

In here, in solution you have all these molecules of solvent, molecules of salt, molecules of acid, or whatever, pH that are going to be around to buffer the pH.

在这里，溶液里包含了所有这些溶剂分子，盐分子酸分子和其它东西，可以用来缓冲。

youdao

Conversely, if your pH starts to become too high or alkaline, the body uses similar tools in reverse to bring down the pH.

相反，如果你的pH值开始变得太高或太碱，你的身体会用类似的器官来反转降低PH值。

youdao

Experts say the ability to take up lead is reduced when the pH level is above six and a half.

VOA: special.2009.06.09

He did his Ph.D. He managed to get a fellowship, and he came to the UK all the way from New Zealand.

他取得了博士学位后，离开了新西兰去英国谋得一个研究职位。

麻省理工公开课 - 固态化学导论课程节选

so ideally I sort of want to get a Ph.D with sociology so that I can go international travel,

所以，理想状态下，我有点想要拿到社会学的博士学位，这样我就可以跨国旅游了，

在美国旅游的经验 - SpeakingMax英语口语达人

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