Dropol德罗波尔dropvt.落下；跌倒；下降；放弃；漏掉；断绝关系n.滴；微量；减少；滴状物drop forged shackle模锻卸扣dropsonde dispenser下投式探空仪分配室drop of temperature温度降落dropping the bottom[机] 落炉, 打炉drop to one's knees跪下drop out of college从大学中途退学drop in temperature降温drop of water level水位下降dropping stock line降料线drop from the cloud从天而降

1. Anything that is dropped falls towards the ground because of the force of gravity.
   落下的东西因为地心引力的缘故，都会掉到地上。