They could sail out for days into the unknown and assess the area, secure in the knowledge that if they didn't find anything, they could turn about and catch a swift ride back on the trade winds.
他们可以在未知的海域航行数天，并对该地区进行评估。他们知道如果没有发现任何东西的话，他们可以掉头，并借着信风迅速返回。
New types of tiny combined heat and power plants are able to turn about half the energy in fuel into electricity, almost matching the efficiency of huge generators.
新型的小规模热电联产机组，能够将燃料中大约一半的能量转化为电力，其效率已与大型发电机的效率相若。
New types of tiny combined heat and power plants are able to turn about half the energy in fuel into electricity, almost matching the efficiency of huge generators.
新型的小规模热电联产机组，能够将燃料中大约一半的能量转化为电力，其效率已与大型发电机的效率相若。
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