armature back force 衔铁反力
back electromotive force [电磁] 反电动势 ; 反电势法 ; 反电势
pull-back force 回拖力
BEMF Back ElectroMotive Force 反电动势
back electromotive force cell 反电动势电池
asymmetric back force 非对称反向压力
Electrostatic Feed-back Force 静电反馈力
back office force 内勤人员
The War Department sent General George Crook to punish the Indians and force them back to their reservation.
VOA: special.2010.04.08
Whenever there is a force, it can be traced back to a tangible material cause, which is all the time a force of contact, with the exception of gravity.
如果有作用力,那它一定能找到一个明确的实体施力物体,也就是无论何时物体受的都是接触力,引力除外
If the Union force attacked before Stonewall Jackson got into position, Lee could not possibly hold it back.
VOA: special.2009.10.15
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