轧棉机是把棉籽从棉花里分离出来的机器.A gin is a machine to separate seeds from cotton.轧棉机是把棉籽从“棉花”里分离出来的机器.A gin a machine to separate seeds from cotton.你发明轧棉机的过程? 好吧, 再见.Was it how you invented the cotton gin? - Okay, goodbye....
Waves are related to oscillating systems.波动与振动系统有关.I checked to see if the needle indicating volume was oscillating.我查看了那根音量指针是否在摆动。In each cycle of operation the particle picks up energy from the oscillating eletric fie...