to try very hard to do sth difficult 努力做（困难的事）
~ (away)
He was in his study labouring away over some old papers.
他在书房里潜心研究一些旧材料。
~ to do sth
They laboured for years to clear their son’s name.
他们为洗刷儿子的罪名努力争取了许多年。
to try very hard to do sth difficult 努力做（困难的事）
~ (away)
He was in his study labouring away over some old papers.
他在书房里潜心研究一些旧材料。
~ to do sth
They laboured for years to clear their son’s name.
他们为洗刷儿子的罪名努力争取了许多年。