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 ...
Streprococci and staphylococci are responsible for a wide variety of infections.链球菌和葡萄球菌是引起各种感染的原因.Objective To invetigate the condition of erm genes in methicillin resistant coagulase negative staphylococci ( MRCNS ).目的...
a meagre diet of bread and water只有面包和水的粗茶淡饭The bank's staff were already angered by a meagre 3.1% pay rise...银行职员对只加薪3.1%已心生怒火。The injured climbers had only meagre supplies of water and peanuts to live off.受伤的登山者只剩下...