That estimate was right on the mark.

那个估计分毫不差。

Wrinkles should just leave a smile on the mark.

皱纹应该只是微笑留下的印记。

Your ideas are right on the mark and your work commendable.

你的想法很中肯并且工作值得表扬。

He never lets an opportunity slip; he's always on the mark.

他总是当机立断，决不错过机会。

Her remarks about literature often landed astonishingly on the mark.

她对文学的评论常常很中肯，令人惊讶不已。