幼虫变为蝶蛹,再变成蝴蝶.A larva metamorphoses into a chrysalis and then into a butterfly.蛹期—黑燕尾蝶冬天时变身蝶蛹,气候回暖时破茧而出,变成蝴蝶.Pupa – Black swallowtails spend winter as chrysalids, emerging as butterflies when warm weather returns....
He spent a large part of his career in Hollywood...他的职业生涯中有很长一段时间是在好莱坞度过的。He has spent a year training crews for next month's round the world race.他已花了一年时间为下个月的环球比赛训练队伍。We have spent a not inconsiderable amount of m...