تىل ئۆگەن ئېنگىلىسچە ئۆگىنىش بىلوگ

11. There is no denying the fact that air pollution is an extremely serious problem： the city authorities should take strong measures to deal with it.无可否认，空气污染是一个极其严重的问题：城市当局应该采取有力措施来解决它。
　　12. An investigation shows that female workers tend to ha...