两个有符号整数相加的结果是一个有符号的整数。

Addition of two signed ints results in a signed int.

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如果是无符号数，它要比有符号的快得多。

And if it is unsigned, then it will be more faster than the signed division.

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例如，常数oxffffffffl是一个有符号的long类型。

For example, the constant OxFFFFFFFFL is a signed long.

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Similarly, just as we have symbols for the presence of sound and its length, we have symbols that represent the absence of sound.

类似的,既然我们有符号,来表示声音的频率和长度,我们也有表示静音的符号

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And so, if we look at our box notation, we've got three states in the p orbital.

因此，如果我们看看我们的盒子符号，在p轨道有三个状态。

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It might be worth pausing over the variety of ways in which we can think of signs in language, all of which have to do with the way in which a given sign might be chosen to go into a speech sentence.

这也许值得尝试,为了理解语言和符号的关系，这一切都和符号怎样,被选择为一段话语的构成部分有关系。

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