Is Hell exothermic ( gives off heat ) or endothermic ( absorbs heat )?地狱是散 发热量 还是吸收热量?A household radiator absorbs energy in the form of electric current and releases it in the form of heat.家用取暖器吸收电流能量，再以热量的形式释放出来。The mo...
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...
在一间屋子里，年轻的母亲们在织布，而她们的孩子就在她们膝上打盹。In one room, young mothers weave while babies doze in their laps.她织布织得很快,而且布的质量很好.She was a fast weaver and the cloth was very good.大家都很忙, 男的耕田, 女的织布.All were busily engaged, men at their ...
请保持地方清洁, 并于使用后把所有废物带离中心.Please keep the place clean, and throw away any garbage.椭圆越扁平,两焦点之间的距离越远,每个焦点离中心的距离也越远.The flatter the ellipse the farther apart the foci and the farther each focus the center....