His design was infinitely better than anything I could have done.

他的设计比我所能设计的不知要好上多少倍。

《柯林斯英汉双解大词典》

Her hair could have done with a wash.

她的头发该洗一洗了。

《牛津词典》

In sports and many areas of life, we think of failures as evidence of something we could have done better.

在体育运动和生活的许多领域，我们认为失败是我们本可以做得更好的佐证。

youdao

But that was probably the best thing I could have done. She looked at it.It was pathetic.

VOA: special.2010.02.08

I could have done this in another way but I am going to just be extra deliberate so I make sure that this copy ends with back slash zero and voila, now, I have a copy.

我可以用另外一种方式来处理,我确保这个拷贝由反斜杠0结尾,那样，现在我得到了一个拷贝。

哈佛公开课 - 计算机科学课程节选

I could have done that just doing the coercion.

我能够做那个强制转换。

麻省理工公开课 - 计算机科学及编程导论课程节选

The West could have done much more to raise the chances for successful reforms.

CENTERFORSECURITYPOLICY: Freedom Flame 2013

It could have done a better job at weaving together the story and the gameplay.

FORBES: [Spoilers spoilers everywhere...]

There were some really interesting things that Google could have done like algorithmic pricing.

FORBES: Tim O'Reilly on Piracy, Tinkering, and the Future of the Book