One is the same tactic used on the Ford (f) Model-T assembly-lines: manufacturers build parts of products in different facilities, making them difficult to reverse-engineer.
3
这些照片中正在形成的U型湖东面东北面是另一个湖,两者的成长史异曲同工。
East-northeast of the oxbow lake forming in these images is another lake that probably developed in similar fashion.