He bitched about the service, then bitched about the bill.他埋怨服务不周到, 后来又埋怨要钱太多.He bitched about the poor service.他抱怨服务质量差.He bitched the job completely.他把那件事完全搞坏了....
为了更加准确地计算火炮弹丸的起始扰动,将两相流内弹道应用于发射动力学研究.This paper focuses on the study of launch dynamics self - propelled artillery.线圈靶测速是一种行之有效的弹丸速度测量方法.Coil target is an effective method to pill velocity measurement.通过外弹道程序,获得弹丸出炮口后的运动...