她在工作中很高兴。

Tā zài gōngzuò zhōng hěn gāoxìng.

She is very happy in her work.

桌子中间有一个杯子。

Zhuōzi zhōngjiān yǒu yí gè bēizi.

There is a cup in the middle of the table.

我在中国学习汉语。

Wǒ zài Zhōngguó xuéxí Hànyǔ.

I study Chinese in China.