士兵们问在阿富汗的广大多山的农村地区中能用多少数字化学灯。
Soldiers are questioning how much they’ll use digital chem lights in Afghanistan’s mountainous, largely-rural terrain.
有害垃圾包括灯、电池及其他含有有害化学物质的物品。
Harmful garbage includes lamps, batteries, and other things with harmful chemicals.
在最后一个步骤中，水经过氯、过氧化氢和其它化学品消毒，并且经过紫外线灯消毒。
During the final stage, the water is disinfected - by the addition of chlorine, hydrogen peroxide and other chemicals and by running it past ultraviolet lights.
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