它绕着质心的椭园运动就几乎看不出来.Its own elliptic motion around it will be almost imperceptible.在无外力时,质心的速度是常量.The velocity of the center of mass is constant in the absence of external forces.错误的根源在于混淆了质心与重心 吗 ?Do We Mistake Center of ...
The repairman reported back that the computer had a virus.修理工报告说电脑染了病毒。The repairman installed an iron latch on the door.修理工在门上安了铁门闩.The TV repairman approximated the cost at fifty dollars.电视修理工估价为50美元....
利用石墨煤增碳的炼钢技术,工艺简单可行, 增碳稳定, 应用广泛.This technical process is simple, carburization is stable, application is widely.对于药芯焊丝,增碳的门槛值在0.05%左右.The critical value of carbon increasing for FCW is about 0.05 %.添增碳粉 、 或者调换硒鼓中部制卡和会员卡...
A downpour of rain put out the children’s bonfire.一阵大雨把孩子们的营火都浇灭了。The seeds that had been sown were almost completely washed away by a sudden downpour.已经播下的种子几乎被一场突如其来的暴雨全冲走了。It was the heaviest downpour ever recorded.那是...
Mr Lima: How many kilometres can I do with that petrol?利马先生: 这些汽油我能开多少公里?Mr Lima: Two tickets for the night ferry, please. Returns.利马先生: 请给我两张晚上的船票. 来回票.The artefacts have gone to Lima for safe keeping.文物被送到利马妥善保管....