英语语法 the time we have is limited 可以变成 we have the time is limited 吗the problem of environment 可以变成 environmental problem吗?feel at a loss on 是什么意思?翻译下：the fast developing society requires adequate knowledge ,which presses us to spare no efforts to study

英语语法 the time we have is limited 可以变成 we have the time is limited 吗
the problem of environment 可以变成 environmental problem吗?feel at a loss on 是什么意思?翻译下：the fast developing society requires adequate knowledge ,which presses us to spare no efforts to study