1 sentence for 衍 (yǎn — to spread out)

1. 植物油来自植物，而矿物油是一种石油衍生物。

   zhí​wù​yóu lái​zì zhí​wù, ér kuàng​wù​yóu shì yī​zhǒng shí​yóu yǎn​shēng​wù.

   Vegetable oil comes from plants, whereas mineral oil is a petroleum derivative.

   Source: CCMatrix