名词动量；势头；动力；推进力网络要素；动量指标；冲力
名词
1. The truck gained momentum as it rolled down the steep road.
卡车沿着陡峭的道路往下开时，冲力愈来愈大。
2. momentum什么意思
2. The movement was gaining momentum.
这运动势头越来越大。
3. A falling object gains momentum as it falls.
下落的物体落下时动量增加。
4. As the rock rolled down, it gathered momentum.
岩石滚下山坡时，冲力愈来愈大。