写作不是一门容易掌握的手艺。
所有这些都应当很容易掌握。
加入图形不仅是让学生更容易掌握信息的手段,也是社会科学家思考方式的一个组成部分。
Graphics are included not merely as a means of making the information easier for the student to grasp, but as an integral part of the way social scientists think.
It's a little... I think that concept is a little bit easier to grasp. It's like a definite rule, and
不过这个有点……我认为这个概念掌握起来稍微容易点。因为有明确的规则,而且是
It's very easy to use. But something you really should master.
这个句型很容易就能学会,这也是你必须得掌握的一个句型。
You can say it easily.
这些句子很容易被掌握。
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