这组电话号码由三个数字组成，很容易记住。

Zhè zǔ diànhuà hàomǎ yóu sān gè shùzì zǔchéng, hěn róngyì jìzhù.

This set of phone numbers is made up of three digits, so it’s easy to remember.

这个团队由十个成员组成。

Zhège tuánduì yóu shí gè chéngyuán zǔchéng.

This team is composed of ten members.

这个材料由两种元素组成。

Zhège cáiliào yóu liǎng zhǒng yuánsù zǔchéng.

This material is composed of two elements.