削球, 切球在网球中用下旋手法击 ( 球 )To cut or slice ( a ball ) with an underarm stroke, as in tennis.运动员可以使用上旋球 、 下旋球和侧旋球.A player may use top spin, back spin or side spin.新唱片《下旋》里面揉合了庞克和重金属两种乐风的虚无主义以及科技摇滚的电子合成器光泽.Meshing the angry ni...
Microsystem simulations and finite element calculations are brifly described.简要介绍微系统模拟和有限元计算方法.The fossil fuels (coal and oil) are finite resources.化石燃料（如煤和石油）属于有限资源。More often, all of the materials exposed to the etchan...