The rural workforce has been flowing in to the cities ever since the open door policy was adopted.
自从改革开放政策实施以来,农付劳动力正不断流向城市。
We keep trying all four methods, but he sheer volume of rubbish we produce worldwide threatens to overwhelm us.
我们一直在试这4种方式,但是,我们在世界范围内仅产生的垃圾的量就有把我们覆盖的危险。