在所有简单无害的娱乐项目背后都隐藏着危险，特别是对儿童而言。Under all the innocent fun, there are hidden dangers, especially for children.即使无害的物质在药物测试中有时也会呈阳性.Even innocuous substances can sometimes register a positive result in a drug test.其中一部分被吸收,...
Megamalls and fast food restaurants line the highway system.公路系统沿线有大型商场和快餐店。The regions are interconnected by an excellent highway system.那些地区通过完善的公路系统相互连接。Chris crawled on his hands and knees out onto the highway.克里斯手脚并...
A courtesy shuttle bus operates between the hotel and the town.有免费班车往返于酒店和市区。The train operates the 2,400-mile round trip once a week.这趟火车每周一次往返行驶2,400英里。The tourist office operates a useful room-finding service.这家旅游办事处提...