When exhaust flow flows through a three-way catalyst, redundant hydrogen and nitrogen oxides in waste gas are subjected to oxidation-reduction reaction to further reduce discharge.

排气流过三元催化器时，废气中多余的氢气和氮氧化物发生氧化还原反应，进一步降低排放。

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Three-way catalyst has been widely used in the developed countries.

国外发达国家已广泛使用三效催化剂。

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This paper introduces the three-way emission control technology and the principle of auto exhaust catalytic converter. The main composition of the three-way-catalyst is also reviewed.

介绍汽车尾气三效催化净化技术及净化器的主要工作原理，并对三效催化剂主要成分： 载体、 涂层、 活性催化剂及助剂进行论述。

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But what it does function as is a catalyst for a different way of thinking.

WSJ: Kehinde Wiley

He added the schools reorganisation document might have been the "catalyst" for the way the vote went, but added that he thought the situation had been misunderstood.

BBC: Gwynedd party coalition meeting

The search engine, which will be described more fully by GSA Administrator David Barram, was a major catalyst in bringing all government information together in a way that the American people can find, quickly and easily.

WHITEHOUSE: Statement of The Honorable Sally Katzen