The bright plumage of many male birds has evolved to attract females.很多雄鸟进化出鲜艳的羽毛是为了吸引雌鸟。Its body plumage suddenly began to ruffle and swell.它全身的羽毛突然竖了起来，胀得鼓鼓的。The birds were in immature plumage.这些鸟儿羽翅未全。...
冰川消融造成海平面上升。The melting ice caused a rise in sea level.当冰消融时, 其分子结构崩溃.When ice thaws, its molecular structure collapses.北冰洋的冰雪消融将会使最大的油轮驶抵那里.Disappearance of the Arctic pack would enable the largest tanker to reach there...
并非一概如此 — 例如从低级铁矿石中生产生铁和钢材的情况一但是这导致了工业发展集中在煤田上.This is not always true - as with the manufacture of pig iron and steel from low - grade iron ores - but it did lead to the concentration of industrial developments on the co...