The other raw material for photosynthesis, carbon dioxide, will be supplied as the exhaust from industrial plants such as power stations, oil refineries and natural-gas processors.

进行光合作用的其他原料——二氧化碳，将由发电站、炼油厂、天然气处理厂之类的工厂排出的废气提供。

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Black smoke is caused by raw fuel being burnt in the exhaust.

黑烟说明有燃料在排气管中燃烧。

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The vaporized steam can be pumped out through vacuum exhaust pipe when the damp raw material absorbed heat.

湿物料吸热后蒸发的水汽，通过真空泵经真空排气管被抽走。

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The other raw material for photosynthesis, carbon dioxide, will be supplied as the exhaust from industrial plants such as power stations, oil refineries and natural-gas processors.

ECONOMIST: Biofuels from algae: Craig's twist | The