I 've been beavering away at this job for hours .

我几小时一直在全力做这件事。

An independent commission is beavering away to come up with ideas for this .

一个独立的委员会正在全力筹建中，以便为此出谋划策。

He was beavering away at his homework until after midnight .

他一直到午夜之后还在用功地做作业。

She has been beavering away at that essay for hours .

那篇作文她已认真地写了好几个小时。

He 's been beavering away at the accounts all morning .

他一上午都忙于做账。