My grades have improved

成绩───achievement;进步───progress

It is an impressive achievement.───这是一项令人敬佩的成就。

Such a goal is impossible of achievement.───这样的一个目标是不可能完成的.

the greatest scientific achievement of the decade───这十年最伟大的科学成就

It is an impressive achievement.───那是一项了不起的成就。

It was quite an achievement to keep smiling when his heart must have been aching.───虽然经受着内心的煎熬，但他仍强作欢颜，这实属不易。

He rated the achievement high.───他高度评价了这一成就.

We mustn't belittle her outstanding achievement.───我们一定不能小瞧了她所取得的杰出成就。

Only the achievement of these goals will bring lasting peace.───只有达成这些目标才会带来持久的和平。