这种催化剂是一种固体物质，能够固定单个反应物分子并优先让反应物分子发生化学反应。
The compressed syngas then flows over a specially designed catalyst—a solid material that holds the individual reactant molecules and preferentially encourages particular chemical reactions.
减去一点反应物的，化学势。
Subtract a little bit of chemical potential from the reactants.
或者你在做化学实验，数据就是，需用的反应物的量，和你想合成的生成物的量。
And if you are doing chemistry then it could be how much you put of some reactant and how much of the output product that you wanted to synthesize generated.
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