听说保持心情开朗能延长寿命。

Tīngshuō bǎochí xīnqíng kāilǎng néng yáncháng shòumìng.

I’ve heard that staying cheerful can extend your lifespan.

会议时间需要延长一个小时。

Huìyì shíjiān xūyào yáncháng yí gè xiǎoshí.

The meeting needs to be extended by an hour.

很多员工不满工作时间被延长。

Hěn duō yuángōng bùmǎn gōngzuò shíjiān bèi yáncháng.

Many employees are unhappy that work hours have been extended.