一辆黑色的梅赛德斯轿车在直升机旁嘎的一声刹住了。A black Mercedes screeched to a halt beside the helicopter.他用某种黑色的黏糊糊的东西粉刷地板。He had painted the floors with some kind of black gunge.有6根电线混缠在一起，而且都是黑色的。There were six wires jumbled up, tied togeth...
Wind turbines are large and noisy and they disfigure the landscape.风力涡轮机个头大、噪音响，还会破坏周边风景。These turbines can be broadly split into two basic types, the impulse and the reaction turbines.这些汽轮机可大致分为两种基本类型, 即冲动式和反动式.The stea...
V2火箭并非普通武器：它只能用于对付城市。原子弹也是这样。The V2 was not an ordinary weapon: it could only be used against cities. Likewise the atom bomb.一颗原子弹能摧毁一座城市。An atom bomb would destroy a city.只有总统才能授权使用原子弹。Only the President could authorize...