hard at it

You must have worked very hard at it.

你一定花了很大劲.

Whatever you do, work hard at it and don't try to dodge the column.

无论做什么事, 都要努力去做,别偷懒.

He found it hard to work with a microphone pointing at him.

他发觉对着麦克风他很难专心工作。

i know you find the subject difficult, but that is all the more reason why yod should work hard at it.

我知道你感到这门学科困难，但这就是你更加应该努力钻研它的理由。

It is a demanding role and she needs to work hard at it.

那是一个要求很高的角色，她必须要加倍努力。

When I left they were all still hard at it.

我离开的时候他们都还在努力工作。

I find it hard to work at home because there are too many distractions.

我发觉在家里工作很难，因为使人分心的事太多。

I studied art and worked hard at it.

我学的是艺术,也很努力.

It was hard going getting up at five every morning.

每天早上五点钟起床太难了。

It is hard to fathom the pain felt at the death of a child.

丧子之痛是难以体会的。

there is no easy way to learn english well, you'll just have to work hard at it.

学好英语不是轻而易举的事，谁都得下苦功夫。