垃圾和污水的清理工作还没有完成。
三年前，当清理工作刚开始时，垃圾随处可见；但今年，青少年们不得不主动去寻找垃圾。
Three years ago, when the clean-up started, garbage was everywhere, but this year, the teenagers had to hunt for garbage.
他们把清理工作变成了一场竞赛，看谁能找到最多的垃圾，谁能以最快的速度卸下船上的垃圾。
They turn the clean-up into a competition to see who could find the most garbage and unload their boats fastest.
应用推荐