小时候觉得大人什么都懂，长大了才知道不是。

Xiǎoshíhou juéde dàrén shénme dōu dǒng, zhǎngdà le cái zhīdào bùshì.

As a child, I thought adults knew everything; only after growing up did I realize they don't.

这部电影太吓人了，小孩不适合看，大人看着都害怕。

Zhè bù diànyǐng tài xiàrén le, xiǎohái bù shìhé kàn, dàrén kànzhe dōu hàipà.

This movie is so scary — it's not suitable for kids, and even adults find it frightening.

大人说话的时候，小朋友不要插嘴。

Dàrén shuōhuà de shíhou, xiǎopéngyou bùyào chāzuǐ.

When adults are talking, children shouldn't interrupt.