常見例句雙語例句Every left parenthesis in a string is matched by a right parenthesis.字符串的左括號都有相應的右括號。A keyword followed by ( (left parenthesis) should be separated by a space.跟在((左括號)後麪的關(guān)鍵字應被一個空格隔開。The enclosing left parenthesis is second from left; hence, $matches[2] is 123.左括號是從左側(cè)算起第二個；因此，$matches[2] 是 123。 返回 left parenthesis