鸡的翅膀逐渐退化, 不会在空中飞行了.The wings of the chicken have become vestigial; it can no longer fly.在一些干旱地带存在严重的土地退化问题。There are serious problems of land degradation in some arid zones.如果你老不用脑，那么这一特殊才能就会退化。If you allow your mind to ...
他的职责是安抚那些人，而不是去激怒他们。His duty was to conciliate the people, not to provoke them.展开调查主要是为了安抚那些压力集团。The inves-tigation was undertaken primarily to mollify pressure groups.当他又开口说话时，语气带有了更多的安抚性。When next he spoke he was more ...