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....
我二十岁前后那几年过得真苦啊。My late teens and early twenties were really rough years.一群易兴奋的十岁儿童a class of excitable ten-year-olds她在二三十岁时找工作一点也不困难.In her twenties and thirties she had had no difficulty getting jobs....