1. 给…深刻印象;使钦佩
    If something impresses you, you feel great admiration for it.

    e.g. What impressed him most was their speed...
           最令他佩服的是他们的速度。
    e.g. ...a group of students who were trying to impress their girlfriends...
           一群竭力想让女友刮目相看的学生

2. 使铭记;使谨记
    If you impress something on someone, you make them understand its importance or degree.

impress

    e.g. I had always impressed upon the children that if they worked hard they would succeed in life...
           我总让孩子们牢记努力工作就会成功。
    e.g. I've impressed upon them the need for more professionalism...
           我已使他们深刻认识到提高专业素养的必要性。

3. 使…注意到;给…留下印象
    If something impresses itself on your mind, you notice and remember it.

    e.g. But this change has not yet impressed itself on the minds of the British public.
           但这一变化还没有引起英国公众的注意。

4. 给…留下(…的)印象
    If someone or something impresses you as a particular thing, usually a good one, they gives you the impression of being that thing.

    e.g. Billy Sullivan had impressed me as a fine man.
           比利·沙利文给我留下的印象是他是个很不错的人。