他测出了超声波穿过骨头的速度。He measured the speed at which ultrasonic waves travel along the bone.超声波扫描显示她怀了双胞胎。Ultrasound showed she was expecting twins.大多数处于妊娠期的妇女将被建议接受超声波检查，不过这不是强制性的。Most women will be offered an ultrasound scan ...
The images provoked strong surges of nostalgia for the days of yore.这些影像勾起了对昔日时光的强烈怀念。The Yellow River surges onward like ten thousand horses galloping.黄河以万马奔腾之势滚滚向前.A ship surges at anchor.抛锚的船随波涛起伏....
The shouting outside grew louder.外面的叫喊声越来越大。As the input of energy is increased, the volume gets louder.随着能量输入的增加, 音量变得更大.Speak louder so the people in the hall can all hear you.大声点讲,以便大厅里的人都能听清....