如果冲量为零, 则动量不变.If the impulse is zero, there is no change in momentum.正周相动力冲量的定义可以用类似的式子表示.The positive phase dynamic impulse can be defined by a similar expression.用于碰撞过程的动量定理——冲量定理.The momentum theorem applied to an imp...
Forestry appertains to geography.森林学和地理学有关.There are other concession to agriculture, forestry and small businesses.对农业 、 林业及小企业也给予其它优惠.Indeed, in may regions " forestry " is synonymous with " plantation culture ".事实上, 在...
Restarting the engine, we motored downriver.我们重新启动马达，沿河而下。I had motored down from Cheshire.我从柴郡一路南下开过来。We motored over to Cambridge to see some friends.我们开车去剑桥看一些朋友....