这本旧书里有一股淡淡的霉味。

There was a ___faint smell of mildew in the old book.

尽管消息很糟，他还是勉强挤出了一丝微笑。

He managed a ___faint smile despite the bad news.

在远处，我们能听到微弱的音乐声。

In the distance, we could hear the ___faint sound of music.