"We'll need to wait for all the girls to enter puberty before we have a good grasp on what the contribution is of those environmental chemicals."

VOA: special.2010.08.18

The political scientist he says must have a grasp of the best regime given the most favorable circumstances.

首先，政治科学家,必需要抓牢最佳政体,营造出最合意的情势；

耶鲁公开课 - 政治哲学导论课程节选

They are really a difficult concept to grasp when you have no base knowledge of it.

当你没有基础知识时，冠词确实很难掌握。

韩国人经常犯的失误 - SpeakingMax英语口语达人

And so we don't have a very good grasp of the Platonic forms.

我们无法对柏拉图式的型相有深入了解

耶鲁公开课 - 死亡课程节选