Lights reflected off dust-covered walls creating a ghostly luminescence.灯光照在满是灰尘的墙上，反射回苍白的冷光。With good light collection, about 30 % of the luminescence quanta may reach the photocathode.在良好的光收集条件下, 约30%的荧光量子可以到达光阴极.cryst...
两个老头儿在外面街角迟迟不走，聊着牛的事情。Outside, two old boys lingered on the street corner discussing cattle.他用棍子碰了碰牛的肋部。He touched the cow's side with his stick.牛的选择性培育the selective breeding of cattle...