In olden days the coasts of England were harassed by the Vikings again and again.古时候,英国沿海一带一再受到北欧海盗的窜扰.All over the world, oil spills regularly contaminate coasts.在世界各地，油溢出物经常污染着海岸。Of necessity they are sited near the co...
标出在Wh - 问句中,wouldyou和couldyou是如何被简化的?Note how would you and could you are reduced in Wh - questions.简化的理想模型可代替复杂的系统.The complicated system maybe represented by a simplified conceptual model.必须牢记这种简化的后果.These simplificati...
Sleds pulled by dogs are in common use in the Arctic.狗拉的雪橇在北极地区很常用.Will there be a nursery full of little grav - sleds and data disks?你说会不会有个幼儿园装满了小芯片和数据碟?A competition in which these sleds race against a clock.'逆&#...