Personnel Management System code, able to add, delete, basic features, such as browsing.
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Able to add essential oil 可加入香精油
You'll be able to add others later.
稍后可以添加其他用户。
Services may be able to add themselves to the list.
服务可以将自身添加到该列表中。
Of course, we also need to be able to add new computers to our inventory.
当然,我们也需要能够给我们的库存增加新的计算机。
So again, we should be able to check all of our formal charges and make sure they add up to 0, which they do, and that makes sense, because we have a neutral atom in terms of thionyl chloride.
因此同样地,我们可以检验一下,我们所有的形式电荷是否正确,确保它们加起来等于零,而它们确实是这样,这是合理的,因为亚硫酰氯是一个中性原子。
That is we'd like to be able to get pieces of them out. We'd like to be able add them together or concatenate them together.
我们也可以对字符串进行切片,实际上这些都可以,因此字符串也支持选择,切片。
I want to just use it, I shouldn't have to worry about what variables I use inside of it, I have shouldn't have to worry about where that is in the code, I should be able to just abstract it away. And that's what we want to add today, are those two things.
我只是想使用它,我不用考虑我在这段代码中,使用的是什么变量,我完全不用考虑代码的内容,只要抽象就好,我们今天想补充的内容就是这两点。
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