膜片振动,这使得周围的空气也动荡起来.The diaphragm vibrates , thus setting the air around it in motion.弱膜片的典型例子是风压计.A unique example of the slack disaphragm is the draft gage.柔韧的膜片一扁平的悬臂校正弹簧相连.The flexible diaphragm is connected to a plat...
She cradled the child in her arms.她把孩子(象摇篮样地)抱在怀里.He cradled the baby in his arms, his hands cupping her tiny skull.他轻轻地抱着婴儿，双手托着她的小脑袋。I cradled my video camera nervously on my lap, but its cold contours did nothing to c...