add them up 求总和
People bring heat with them. They also add wetness to the dry air.
VOA: special.2009.12.15
So if we add them all up, there should be no net charge on the molecule, if the molecule is neutral.
因此如果我们把它们都加起来,这个分子上应该没有净电荷,如果这个分子是中性的话。
So what would I want to do? I'd like to somehow walk down each of the digits one at a time and add them up. Ah, that's a looping mechanism, right? I need to have some way of walking through them.
去取这个数的,每个数字然后把他们加起来,啊,这是个循环机制对不对?,我得找到一个遍历它们的方法,一种简单的方法可能。
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