少于用英语怎么说一个词

少于用英语表示为 "less than"，其来源为英文 less 和 than 的组合。less 意为 "少"，than 意为 "比"。
例句：
The temperature is less than 20 degrees. (温度低于 20 度)
He weighs less than 60 kilograms. (他体重小于 60 公斤)
There are less than 10 people in the room. (房间里有少于 10 人)