Much greater pressure can be produced by using a machine, a hydraulic jack.
VOA: special.2009.09.29
Well the way to find it is by using a process called electrophoresis and Southern blotting.
找到二者差异的方法称作电泳和,琼脂糖凝胶电泳印迹
In trying to comfort your friend you could ask about his situation by using a "When" question.
为了安慰你的朋友,你可以用“When”问句来询问他的情况。
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