这个练习需要更多技巧，因为要按照分组和周期将数据排列成常见的格式，所以需要某些具有想像力的代码，不能简单地将各部分放在固定的位置。

What about the entire periodic table? That exercise is trickier because you have to arrange the data into the familiar format based on group and period, which requires some fancy coding.

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因为我要在考试前有限的时间内学习，所以我决定集中大部分时间和精力去复习数学技巧和做练习题。

Because I had a limited time to study before taking the test, I decided to focus most of my time and energy on reviewing math skills and doing practice problems.

youdao

同时你还可以通过加拿大大部分社区都提供的材料和辅导，练习并掌握书中所介绍的技巧。

The techniques described here may be learned and practiced using the materials and know-how available in most communities in Canada.

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