成对

zhè zhǒng shù yè shì chéng duì shēng zhǎng de

这种树叶是成对生长的。

The leaves of the tree are arranged in pairs.

nǐ bù néng chuān zhe bù chéng duì de wà zi chū mén

你不能穿着不成对的袜子出门。

You can't go out wearing odd socks.