他们中有很多人表情阴郁，留着平头，一看就是警察。Many of them were policemen, with their heavy faces and cropped hair.他正往墙上钉一枚平头钉用来挂画.He is hammering a tack into the wall to hang a picture.他用双手摸了摸他平头上柔软的短发。He rubbed his hands over the soft brist...
我们正逐渐过渡到完全使用公制。We are gradually changing over to a completely metric system.在公制中, 用米和升作计量单位.In the metric system, measurements are made in metres and liters.公制适用于全世界.The metric system is fit to all of the world....