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。
At that time, however, she was not only the largest ship that had ever been built, but was regarded as unsinkable,
当时,这艘轮船不仅是造船史上建造的最大的一艘船,而且也被认为是不会沉没的。