这个方法将取两个数(两个IDL的long型数)并返回这两个数之和。

This method takes two Numbers (IDL longs) and returns the sum of those Numbers. Here is our interface calculator.

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随后的两种——float和double，代表了浮点型数，同样具有不同的动态范围。

The next two—float and double—represent floating-point numbers, again with different dynamic ranges.

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防水型数显时钟，用于竞赛和训练场合。

Waterproof digital clock for competition and practice Settings.

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Expect the address of an int but here in the context of the function itself inside the curly braces, it means go to that address.

一个整型数的地址，但是在函数,大括号中的环境中，意思是定位到那个地址。

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It just throws the decimal point away and that's because, again, these are ints and the answer intuitively should be a floating point value, but I need to be more specific.

它直接把小数点后面的数值丢弃掉了，因为，凭直觉，那些整型数和结果应该是一个浮点数据,但是我需要一个更精确的数值。

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4 So even if the correct mathematical answer is 1.4 or whatever, when you divide an int by an int, you only have room in that variable, in the response for an actual integer.

所以即使那个正确的答案是4,或别的数值，当你用一个整型数除以一个整型数，在那个变量的返回值里，只有,存储一个整型数的空间。

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