小括号中的文字表示参数的默认值。

Bracketed text indicates a parameter's default value.

youdao

注意：输入字符串除了左右小括号外，还可能包含字母。

Note: the input string may contain letters other than the parentheses (and).

youdao

为什么在receive 后面的代码被包含在大括号｛｝中而不是小括号（）呢？

Why is the code after receive enclosed in curly braces ({…}) and not parentheses ((…))?

youdao

如果你们还想见到它的话，我就在这里加上，方便你们理解它的意义，但实际上，通常我们不会加小括号的。

But, if you still want to see them, I'm going to put that in very thin so that you see what it means. But, actually, the convention is we won't put this parentheses in there anymore.

youdao

如果你们还想见到它的话，我就在这里加上，方便你们理解它的意义，但实际上，通常我们不会加小括号的。

But, if you still want to see them, I'm going to put that in very thin so that you see what it means. But, actually, the convention is we won't put this parentheses in there anymore.

youdao