代码传输只会发生一次，但每次在另外一端遇到验证问题时都要传输数据。
Code transmission happens only once, whereas data must be transmitted every time you encounter a validation problem at the other end.
虽说锡层脱落时这口锅还是能用的，但你必须保证每次在烧菜前用力擦洗锅子，而且菜一烧好就得马上出锅，因为烧好的菜可能会跟锡层已经脱落的铜锅发生有毒的化学反应，所以最好还是及时地重镀锡层。
If cooked food remains in a poorly lined pot, some kind of a toxic chemical reaction can take place. It is thus best to have the pot re-tinned promptly.
应用推荐