口若悬河-------talk nine words at once

例句：

A: He's so tough as to win the debate contest again.
他如此厉害，以至于又赢得辩论比赛了。
B: It's taken for granted, for he always talks nine words at once.
那是理所当然的，因为他总是口若悬河。

同义词：

rattle on