The students had a grasp of decimals, percentages and fractions.

学生们掌握了小数、百分数和分数。

《柯林斯英汉双解大词典》

I guess you need to start with that so that you can get a grasp of the concepts and learn a few facts before you start putting it into practice.

我想你需要先从这一点开始，这样你才能掌握这些概念，在付诸实践之前了解一些事实。

youdao

For example, we think of our ability to distinguish between right and wrong as a fundamental part of what makes us human, giving us a grasp of morality and philosophy.

比如，我们认为，我们区分正确与错误的能力是我们之所以成为人类的一个根本特征，即我们对道德和哲学的掌握。

youdao

"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

It slows us down, yes, but this slowing down is a means of enriching what we finally grasp to be the meaning of a text.

它阻碍了我们的阅读,它阻碍了我们的阅读，但是同时也丰富了文本意义。

耶鲁公开课 - 文学理论导论课程节选

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

After all, the tablet computer is covered with a glass plate and is large and heavy enough (1.5 lbs) to easily slip out of a one-handed grasp.

FORBES: iPad's Screen Cracking Far Less Than iPhone's So Far

It is high time for the CBO to form a Team B so we can get a better grasp of economic reality.

FORBES: Are CBO Estimates Really The Gold Standard Of Accuracy?

Obama, who in the first debate in late April appeared nervous and insufficiently prepared, had a smoother delivery this time and a more detailed grasp of policy issues.

NPR: Democratic Presidential Debate Targets Iraq War