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free hydrogen 【化學】有效氫,游離氫。

free labour

They are sulphide and free hydrogen sulphide . from 1989 , selected monitoring stations also monitored e . coli and faecal coliforms , which indicate faecal contamination from domestic sewage and animal waste . these two bacterial parameters were extended to all stations from 1999 自1989年開始,部分河溪監測站開始監測大腸桿菌及糞大腸菌群以顯示住宅污水及動物糞便所造成的水污染其后在1999年起,所有監測站均測試此兩項細菌參數。

At some point in the future , cars could run on electricity or carbon - free hydrogen extracted from coal at facilities where co2 is captured 有朝一日,車輛就能以電力或由煤萃取無碳氫氣為動力,而這些動力制造廠都具備捕集二氧化碳的能力。