Mollie gave an uneasy little titter.

莫莉不自在地微微窃笑了一下。

He made a sad business of it with his unsteady hand, and a smothered titter rippled over the house.

他那颤抖的手却把这件事弄得很糟糕，整个屋子发出了一阵憋住的嗤笑声。

Mention sex therapy and most people will titter in embarrassment.

提到性疗法，许多人会尴尬地窃笑。

But I titter in the one side.

而我则在一旁偷笑。

Looked can only titter.

看完只能自己偷笑。