that is why用法

释义：这就是为什么，因此

That's why I was getting married. ---《老友记》 第一季 第一集

这就是我为什么结婚的原因。

例句：

1. Mr. Gorbachev, on the other hand, recognized that his sluggish and authoritarian bureaucracy was the worst impediment to modernization. That is why the Soviet leader came more quickly to the view that political and economic change must go hand in hand.

   在另一方面，戈尔巴乔夫承认，他的既迂腐又专权的官僚政府是现代化最大的阻碍。因此这位苏联领袖迅速意识到，政治与经济改革必须齐头并进。

2. And that is why in this field, I have made recommendations.

   为此，我在这方面提出了一系列建议。

3. That is why electricity finds such a wide application in industry.

   那就是为什么电在工业上得到这样广泛应用的原因。

4. That is why I am on intimate term with Mr. Aoki.

   那是我与奥基先生关系亲密的原因。

注：

that is why后面跟的是结果,译为：“那是（为什么）...... 的原因”
例如：
Tom overslept this morning. That is why he was late for work.
  汤姆今天早晨睡过头了。那是他上班迟到的原因。

that is because后面跟的是原因，译为：“那是因为.......”
例如：
Tom was late for work this morning. That is because he overslept.
  汤姆今天早晨上班迟到了。那是因为他睡过头了。