left parenthesis
常见例句
- Every left parenthesis in a string is matched by a right parenthesis.
字符串的左括号都有相应的右括号。 - A keyword followed by ( (left parenthesis) should be separated by a space.
跟在((左括号)后面的关键字应被一个空格隔开。 - The enclosing left parenthesis is second from left; hence, $matches[2] is 123.
左括号是从左侧算起第二个；因此，$matches[2] 是 123。 返回 left parenthesis