这个瓶盖太滑了，我怎么拧也拧不开。

Zhège pínggài tài huá le, wǒ zěnme nǐng yě nǐng bù kāi.

The bottle cap is too slippery; no matter how I twist it, I can’t open it.

拧毛巾的时候别太用力，小心把布扯坏了。

Nǐng máojīn de shíhou bié tài yònglì, xiǎoxīn bǎ bù chěhuài le.

Don’t use too much force when wringing the towel, or you might tear the cloth.