They are emotionally mature and should behave responsibly...他们在情感上已经成熟，应该负责任地行事。They are emotionally mature and should behave responsibly.他们在情感上已经成熟，应该负责任地行事。The report said that the doctor had acted very responsibly.报告说...
There was a whine of hydraulics as the undercarriage locked into position.随着液压系统嘎吱一声响，起落架进入了锁定位置。The undercarriage on light aircraft does not always retract in flight.轻型飞机飞行时起落架不一定缩回.A kind of cutter undercarriage mechan...