lip-synch

But I heard that many pop stars do lip-synch these days.

不过我听说现在有很多流行歌手都假唱。

May: I agree with you on that. Much better to sound off sometimes than to lip-synch.

阿美：我同意你的观点。即使失声也比假唱强。

If you have fully mastered the meaning, lip-synch the dialogues from the script with the actors.

如果你完全掌握了它的意思，那么就和剧本中的演员对口型吧。