分组是由圆括号内的一组字符指定的。

Groupings are specified by a group of characters within parentheses.

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相反，嵌入到括号内的模式将捕捉匹配模式的文本。

Instead, embedding a pattern within parentheses captures the text that matches the pattern.

youdao

请注意花括号内的语法为 make={make}。

Note the syntax of curly brackets as make={make}.

youdao

It says that function, f of x, is bounded above here's an upper limit on it, that this grows no faster than quadratic in n, n squared.

这意味着这个方法f是有上限的,这个方法增长的速度,不会比括号内的n*n快。

麻省理工公开课 - 计算机科学及编程导论课程节选