减小体积，分子就更加频繁地撞击器壁。
A decrease in volume causes the molecules to hit the walls more frequently.
这是前苏联继第一艘月球撞击器之后的后续探月航天器，也是第一艘拍摄月球背面的航天器。
This Soviet follow-up to the first moon impactor became the first spacecraft to take pictures of the far side of the moon.
本文介绍了应用级联撞击器和佩戴口罩的人头模型在天然铀燃料元件加工现场测定吸入气溶胶粒度的方法。
This paper describes a method for measuring particle size of inhaled aerosol with a phantom of human head wearing dust-proof mask anda cascade impactor.
下周，新的LCROSS卫星将会在月球南极释放一颗撞击器进行撞击，那将会在形成一个永夜下的陨石坑，进一步了解是否有水或冰隐藏在月球表面。
Next week, the new LCROSS satellite will release an impactor that will strike a permanently Shadowed crater near the lunar South Pole to see if any hidden water or ice sprays free there.
下周，新的LCROSS卫星将会在月球南极释放一颗撞击器进行撞击，那将会在形成一个永夜下的陨石坑，进一步了解是否有水或冰隐藏在月球表面。
Next week, the new LCROSS satellite will release an impactor that will strike a permanently Shadowed crater near the lunar South Pole to see if any hidden water or ice sprays free there.
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