speech可数吗

　　例句

　　This speech may mark a change in government policy.

　　这篇演讲表明政府的.政策可能会有变化。

　　His speech was full of fine words which meant nothing.

　　他的演讲华而不实。

　　This expression is used mainly in speech, not in writing.

　　这种表达主要用于口语，而不是书面语。

　　Who could forget his speech at last year's party?

　　谁能忘记他去年在聚会上的讲话呢？