压力会导致睡眠不足。

Yālì huì dǎozhì shuìmián bùzú.

Stress can lead to insufficient sleep.

这个产品的质量还有不足之处。

Zhège chǎnpǐn de zhìliàng háiyǒu bùzú zhīchù.

This product still has some shortcomings in terms of quality.

我的知识水平还不足以解决这个问题。

Wǒ de zhīshì shuǐpíng hái bùzú yǐ jiějué zhège wèntí.

My level of knowledge is not sufficient to solve this problem.