测试材料中是否含有危险物质请在下面说明。

Are any hazards associated with the materials please indicate any hazards below.

youdao

如果你对上述任何一个问题回答“是”，那么请在下面说明所有相关细节。

If you answered 'Yes' to any of the above questions, give ALL relevant details below.

youdao

在下面的示例中我将说明如何进行这种定制编码。

I will explain how this custom encoding can be done in the following example.

youdao

And this is an example where unoccupied 5d lies below 4f.

这就说明,未布满的5d层在4f层下面。

麻省理工公开课 - 固态化学导论课程节选