3 sentences

1. 这只是他们工作的一小部分。

   zhè zhǐ​shì tā​men gōng​zuò de yī xiǎo bù​fen.

   This is only one small part of the work they do.

   Source: CCMatrix

2. 这只是你要知道的一小部分。

   zhè zhǐ​shì nǐ yào zhī​dao de yī xiǎo bù​fen.

   This is just a small part of what you need to know.

   Source: CCMatrix

3. 鱼也是健康饮食中的一小部分。

   yú yě​shì jiàn​kāng yǐn​shí zhōng de yī xiǎo bù​fen.

   Fish is also one small part of a healthy diet.

   Source: CCMatrix