3 sentences

1. 木头含有一定量的水。

   mù​tou hán​yǒu yī​dìng liàng de shuǐ.

   Wood contains a certain amount of water.

   Source: CCMatrix

2. 你的大脑一次只能做一定量的工作。

   nǐ de dà​nǎo yī​cì zhǐ​néng zuò yī​dìng liàng de gōng​zuò.

   Your brain can only do a certain amount of work at a time.

   Source: CCMatrix

3. 人类需要一定量的体内脂肪来维持基本功能。

   rén​lèi xū​yào yī​dìng liàng de tǐ​nèi zhī​fáng lái wéi​chí jī​běn gōng​néng.

   Humans need a certain amount of body fat to maintain basic functions.

   Source: CCMatrix