英语翻译1 我们必须致力于改进教育工作（concentrate on）2 他被派去报道那次会议的有关情况（cover）3

We must concentrate on improving the work of education。He was sent to cover that meeting。Only if you have experienced the pain of suffering can you realize the preciousness of  happiness。He was accused of murder and sentenced to death。Mary and I went there very early so as to get a good seat。