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.

youdao

但这首歌的难处在于需要不断的换气、发声，所以我要反复练习。

But the song requires continuous breathing and voicing, which is hard, and I had to practice it over and over again.

youdao

所以这是需要练习的，但这做起来超快也超简单。

So it does take practice, but it's super quick and easy to do.

youdao