另一种可能性是亲鸟会偏爱强壮的雏鸟。Another possibility is that parents favour chicks that are strong.那只蛋的壳厚0.14毫米，新孵出的雏鸟重9克。The egg had a shell thickness of 0.14mm and the newly-hatched chick weighed nine grams.雏鸟出壳后不久就不见了。The young disa...
我刚发动引擎时，引擎冒出火星，发出长长的嘶声，然后就熄火了。When I started the engine it sparked, fizzed and went dead.飞机快到机场时，本来有故障的左引擎突然熄火，引发了灾难。The faulty left-hand engine failed catastrophically as the aircraft approached the airport.你的脚离开踏板，汽车便会...