Titanium dioxide(TiO_2) has shown promise as a photocatalyst,which is powerful enough to decompose hazardon,pollutants into innocuous substances. In this paper,titanium dioxide was prepared by the high-temperature thermohydrolysis method and crystallized in organic media. The best conditions of preparation had been achieved by the photocatalytic degradation of safranine,TNB:toluene:water equal to 1∶9 6∶7.7 and holding on constant 220 centigrade for 2.5 hours. In addition,photocatalytic degradation of safranin...
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If a tap is used, unfiltered water equal to the amount drawn off should be added to the top.
如果使用了水龙头，等同于排出数量的未过滤水应该增加在顶部。
As a ship is loaded it sinks deeper into the water, displacing an additional amount of water equal to the weight of the added load.
当船装了货，吃水就深些，排开的水量即等于所加负荷的重量。
Sedimentation tanks should have the capacity to store an amount of water equal to a day's consumption, thus allowing sedimentation to take place overnight.
沉淀池应该有能力贮存大量的水，起码等同于一白天的消耗量，从而允许头一晚进行沉淀。
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