介紹一個新的水處理系統(tǒng) sea water purify (SW40)
31-40 Completion
31. High level of salts makes bore water unsafe to drink.
32. SW40 makes the bore water clean it can be used in hospitals
33. SW40 can work effectively but sometimes it is quite slow
34. They want to get money from an agency called Health International
35. SW40 can provide a maximum output of 9 liters on a sunny day.
36. Each SW40 can support the water use of a family
37.蓋子 is made of glass
38. SW40 和水平面的夾角是 12.5°
39 UV radiation 紫外線 can destroy germs
40. 一個管子滴水到一個圓心的桶里,這個桶叫什么? water collection tank
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