Polysubstituted pyridines and 1,4-dihydropyridines were prepared in a three-component reaction of aromatic aldehyde, malononitrile and aliphatic amine in a mixed solvent of methanol and water.

在甲醇和水的混合体系中，通过芳醛，丙二腈和脂肪胺的三组分反应我们顺利得到了一系列多取代的吡啶和1，4-二氢吡啶衍生物。

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The reaction in this case is to simply put the response's text message into the ChatLog component for all to see.

在这种情况作出的反应很简单地放入到聊天记录中以供所有用户可见。

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Abstract: in the machine tool, the power head is the core component of the machine, which is the direct reaction process performance.

摘要：机床中，动力头是机床的核心部件，直接反应着机床的加工性能。

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"When five black people appear to be shot by a white person, then the immediate reaction is there is a racial component, " Tulsa Mayor Dewey Bartlett told CNN.

CNN: Police probe possible racial motive in Tulsa killings

But I think my reaction in Belize also has a more behavioral component: Home displays of energy use make this use more salient and may reduce our usage even if prices do not change.

FORBES: Paying Attention To Energy Use

The crucial component is a thin membrane laced with expensive elements that helps conduct the chemical reaction.

FORBES: Why Hydrogen Cars Could Still Be The Future