我的名字有十个字母。

Wǒde míngzi yǒu shí gè zìmǔ.

My name has ten letters.

书本根据字母顺序排列。

Shūběn gēnjù zìmǔ shùnxù páiliè.

The books are arranged in alphabetical order.

密码必需要由至少六个字母组成。

Mìmǎ bìxū yào yóu zhìshǎo liù gè zìmǔ zǔchéng.

The password must be made up of at least six letters.