20 in English can be said as "twenty." The number comes from the Old English word "twentig," which is derived from the Proto-Germanic word "twentigaz."

Here are some examples of how to use the number twenty in English sentences:

I have twenty dollars in my wallet.

There are twenty students in my class.

The movie is two hours and twenty minutes long.

In Chinese, the number twenty can be said as "二十" (èrshí) or "廿" (niàn). Some examples of how to use the number twenty in Chinese sentences are:

我的钱包里有二十美元。(Wǒ de qiánbāo lǐ yǒu èrshí měiyuán. - I have twenty dollars in my wallet.)

我的班级里有二十名学生。(Wǒ de bānjí lǐ yǒu èrshí míng xuéshēng. - There are twenty students in my class.)

这部电影有两小时二十分钟。(Zhè bù diànyǐng yǒu liǎng xiǎoshí èrshí fēnzhōng. - The movie is two hours and twenty minutes long.)