小分子是能够很廉价地合成的。
如果你已经将核心概念简化，那么非常快速并且廉价地构建这一概念。
When you have your simplified core concept ready, then build that core concept very quickly and cheaply.
内部燃料电池是超高效迷你电站，可以有效且廉价地提供电力与热水。
Domestic fuels cells are super-efficient mini power stations that can efficiently and cheaply provide electricity and hot water.
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