Usage note
低于用于比较两个数值或事物，表示前者小于后者。
dīyú yòng yú bǐ jiào liǎng gè shù zhi huò wù xìng, biǎoshì qián fá xiǎo yú hòu fá.
低于 is used to compare two numbers or things, indicating that the former is lower than the latter.
Context note
低于常用于描述天气、身高、体重等日常生活中常见的比较情况。
dīyú cháng yòng yú miáo huì tāi qì, gāo shēn, tǐ zhòng děng rì cháng shēn zhōng cháng jiàn de bǐ jiào kuàng jí.
低于 is commonly used to describe comparisons in daily life such as weather, height, weight, etc.
5 examples
这个温度低于零度。
zhè ge wēn dù dī yú líng dù。
This temperature is lower than zero degrees.
他的身高低于平均水平。
tā de shēn gāo dī yú píng jūn shuǐ píng。
His height is lower than the average level.
这本字典的页数低于那本。
zhè běn zì diǎn de yè shù dī yú nà běn。
This dictionary has fewer pages than that one.
他的体重低于标准。
tā de tǐ zhòng dī yú biāo zhǔn。
His weight is lower than the standard.
这个价格低于市场价。
zhè ge jià gé dī yú shì chǎng jià。
This price is lower than the market price.
5 mini stories
小明的身高低于他的同学，但他跑得比他们快。
xiǎo míng de shēn gāo dī yú tā de tóng xué， dàn tā pǎo dé bǐ tā men kuài。
Xiao Ming's height is lower than his classmates', but he runs faster than them.
天气预报说今天温度会低于昨天。
tiān qì yù bào shuō jīn tiān wēn dù huì dī yú zuó tiān。
The weather forecast says today's temperature will be lower than yesterday's.
小红的体重低于正常范围，医生建议她多吃点。
xiǎo hóng de tǐ zhòng dī yú zhèng cháng fàn wéi， yī shēng jiàn yì tā duō chī diǎn。
Xiao Hong's weight is below the normal range, and the doctor advised her to eat more.
这本书的价格低于其他同类书籍。
zhè běn shū de jià gé dī yú qí tā tóng lèi shū jí。
This book's price is lower than other similar books.
他的成绩低于预期，但他仍然努力学习。
tā de chéng jì dī yú yù qī， dàn tā réng rán nǔ lì xué xí。
His grades are below expectations, but he still studies hard.
Mini dialogue
量体温
A
你的体温低于37度吗？
Nǐ de tǐwēn dīyú sānshíqī dù ma?
Is your body temperature lower than 37 degrees?
B
是的，低于37度，很正常。
Shì de, dīyú sānshíqī dù, hěn zhèngcháng.
Yes, it's lower than 37 degrees, very normal.
比身高
A
我的身高低于我哥哥。
Wǒ de shēngāo dīyú wǒ gēge.
My height is lower than my older brother's.
B
没关系，你还会长高的。
Méiguānxi, nǐ hái huì zhǎng gāo de.
It's okay, you will still grow taller.
Related words and contrasts
opposite
高于
gāo yú
higher than
高于 means 'higher than', the direct opposite of 低于.
contrast
少于
shǎo yú
less than (quantity)
少于 is used for comparing quantities (less than), while 低于 is often used for levels, temperatures, or standards.
similar
不到
bú dào
not reaching, less than
不到 can mean 'less than' or 'not reaching' a certain point, similar in meaning to 低于 in some contexts.