three forces sensor 三分力传感器
principle of three-forces converging 三力汇交定理
Three Driving Forces 三驱动力
the three economic forces 三大经济势力
These Three Driving Forces 通过这三者驱动
three concurrent forces balance 三力平衡
three factors of forces 力的三要素
She identifies three forces at work.
她指出有三种力量在起作用。
And these are the only three forces that are on it.
这是物体上，仅有的三个力。
These three forces must eat each other up, so to speak.
这三个力必然互相抵消。
In eighteen sixty-three, Union forces defeated Confederate forces in the bloodiest battle of the American Civil War the Battle of Gettysburg.
VOA: special.2009.11.19
And it was three days after the Confederate Army of the southern states attacked federal forces at Fort Sumter, South Carolina.
VOA: special.2011.04.15
In nineteen forty-three, George Moriarty wrote a song designed to support American forces fighting in World War Two.
VOA: special.2011.04.04
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