with a sorrowful mien带着忧伤的神色Be always as merry as ever you can, for no-one delights in a sorrowful man.务请心情常欢畅,只因无人喜忧伤。A funeral is a sorrowful occasion.葬礼是一种令人悲伤的场合.His father's face looked suddenly soft and sorrow...
幼虫变为蛹,然後再变成蝴蝶.A larva metamorphose into a chrysalis and then into a butterfly.蝴蝶由蛹孵化而出.The butterfly emerged from the pupa.蛹蛰伏在土壤中,直到冬天它们才蜕变成蛾子飞出来。The pupae remain dormant in the soil until they emerge as adult moths in ...