他生病了，因此今天不能来上课。

Tā shēngbìng le, yīncǐ jīntiān bù néng lái shàngkè.

He is sick; therefore he can’t come to class today.

他平时很努力学习，因此成绩一直很好。

Tā píngshí hěn nǔlì xuéxí, yīncǐ chéngjì yìzhí hěn hǎo.

He usually studies very hard, so his grades have always been good.

由于天气不稳定，因此我们决定取消这次的室外活动。

Yóuyú tiānqì bù wěndìng, yīncǐ wǒmen juédìng qǔxiāo zhè cì de shìwài huódòng.

Due to unstable weather, we have consequently cancelled the outdoor event.