名詞 catalyst:

1. (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected
   同義詞：accelerator
2. something that causes an important event to happen

1. A process by which the hydrocarbon molecules of petroleum are broken into simpler molecules, as of gasoline or kerosene, by the addition of hydrogen under high pressure and in the presence of a catalyst.
   氫化裂解將石油的含氫分子分裂成更簡單的分子(象汽油和煤油的分子)的過程，此分裂過程是在加催化劑及高壓氫氣的條件上進(jìn)行的
2. A substance, especially an enzyme, that initiates or modifies the rate of a chemical reaction in a living body; a biochemical catalyst.
   生物催化劑能在活的體內(nèi)產(chǎn)生化學(xué)反應(yīng)或改變生物體內(nèi)化學(xué)反應(yīng)速度的物質(zhì)，尤指酶; 生物化學(xué)催化劑
3. The offer of a new job provided just the catalyst she needed.
   這份新工作正是她所需要轉(zhuǎn)變的契機(jī)。

cat.a.lyst

n.（名詞）
Chemistry A substance, usually used in small amounts relative to the reactants, that modifies and increases the rate of a reaction without being consumed in the process.
【化學(xué)】 催化劑：一種與反應(yīng)物相關(guān)、通常以小劑量使用的物質(zhì)，用來改變和加快反應(yīng)速度，而自身在反應(yīng)過程中不被消耗
One that precipitates a process or event, especially without being involved in or changed by the consequences.
觸媒：加速一個過程或事件的進(jìn)度，但自身并未卷入或不被其后果改變的物質(zhì)

來源：
From catalysis
源自 catalysis

<參考詞匯><同義詞>catalyst,ferment,leaven,leavening,yeastThe central meaning shared by these nouns is .an agent that stimulates or precipitates a reaction, development, or change.:
這些名詞共有的中心意思是.剌激或加速反應(yīng)、發(fā)展或變化速度的動因.：
例句：
a serious breach of trust that was the catalyst for the divorce;
成為離婚催化劑的一次嚴(yán)重的背信行為；

例句：
love, the most powerful ferment;
愛，最有力的改變媒介；

例句：
the leaven of reform working in their minds;
變革的媒介在他們的頭腦中運(yùn)作；

例句：
a leavening of humor;
幽默的發(fā)酵劑；

例句：
the yeast of revolution.
引發(fā)革命的介質(zhì)