She hesitated before replying.

她犹豫了一下才回答。

I hesitated a millisecond too long.

我几乎没犹豫。

Mary made as if to protest, then hesitated.

玛丽似乎要抗议，又犹豫了。

She hesitated for a moment and then went on.

她犹豫了一会儿，然后继续往下说。

She hesitated, then put her hand on Grace's arm.

她犹豫了一下，然后把手搭在格雷斯的臂膀上。