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...
The diving school has acquired a franchise for scuba equipment.潜水学校获得潜水用水肺的特许经营权.Catering in the schools is run on a franchise basis.学校餐饮服务以特许权经营.Talk to other franchise holders and ask them what they think of the parent...
It is supposed to be washed down the gutter and into the city's vast sewerage system.它应该是被沿排水沟冲入城市庞大的排水系统。Sewerage systems are either'separate'or'combined '.排水系统有 “ 分流制 ” 和 “ 合流制”.The acid waste ...