two birthday presents 两件生日礼物
Chapter Two presents the research design.
第二章介绍研究设计。
Part two presents research on adaptability of wagons.
第二部分为车辆匹配性研究。
These two presents aim to let me study hard and not to waste time.
这两件礼物是为了让我好好学习,抓紧时间。
In two thousand six,his book, "The Language of God: A Scientist Presents Evidence for Belief,"
VOA: special.2009.12.01
that's one way to think about it, and there's also another way, and this is the way that your book presents it. If you, in fact, have two of the same atom right next to each other, let's say you have a crystal, or let's say you're talking about a metal, what you can do is just look at the distance between the two nuclei, and split that in 1/2, and take the atomic radius that way.
这只是一种定义的思路,另外还有其它方法,也就是你们课本上的方法,如果你,事实上,有两个相同的原子彼此靠在一起,比如说你有一个晶体,或者说你讨论的是一个金属,你所要做的就是,看看这两个原子核之间的距离,然后将距离除以二,就得到了这个原子的半径。
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