他总爱买一些没用的玩意儿回家。

Tā zǒng ài mǎi yìxiē méiyòng de wányìr huíjiā.

He always likes to buy some useless gadgets and bring them home.

别乱碰这些精密的玩意儿，小心弄坏了。

Bié luàn pèng zhèxiē jīngmì de wányìr, xiǎoxīn nòng huài le.

Don't randomly touch these delicate gadgets; be careful not to break them.

这种高科技玩意儿对老人来说有点儿难用。

Zhè zhǒng gāokējì wányìr duì lǎorén láishuō yǒu diǎnr nányòng.

These high-tech gadgets are a bit hard for elderly people to use.