Usage note
二表示数字2，用来数东西或说顺序。
Èr biǎoshì shùzì 2, yòng lái shǔ dōngxi huò shuō shùnxù.
This word means the number two. It is used for counting objects or talking about order.
Context note
“二”是数字，表示比一多一个。我们数东西或说顺序时常常用到它。
“èr” shì shùzì, biǎoshì bǐ yī duō yī gè. Wǒmen shǔ dōngxi huò shuō shùnxù shí chángcháng yòng dào tā.
This word is used when counting objects or talking about order, meaning the number two.
5 examples
我有两个苹果
wǒ yǒu èr gè píngguǒ
I have two apples
他有两个朋友
tā yǒu èr gè péngyǒu
He has two friends
我们买两本书
wǒmen mǎi èr běn shū
We buy two books
她有两个孩子
tā yǒu èr gè értóng
She has two children
他每天走两公里路
tā měitiān zǒu èr gōlkōlù
He walks two kilometers every day
5 mini stories
小明有两个玩具车。他喜欢玩它们。
xiǎomíng yǒu èr gè yóuèqi chē. tā xǐhuān wán tāmen.
Xiaoming has two toy cars. He likes to play with them.
妈妈有两个孩子。一个男孩，一个女孩。
māma yǒu èr gè értóng. yīgè nán hái, yīgè nǚ hái.
Mom has two children. One is a boy, the other is a girl.
爸爸每天骑两公里自行车。
bàba měitiān qí èr gōlkōlù zìxíngchē.
Dad rides his bicycle two kilometers every day.
姐姐有两个妹妹。她们一起玩得很开心。
jiějie yǒu èr gè mèimei. tāmen yīqǐ wán de hěn kāixìn.
The older sister has two younger sisters. They play together very happily.
爷爷有两个孙子。他们都很可爱。
grándài yǒu èr gè sūzǐ. tāmen dōu hěn kě’ài.
Grandpa has two grandsons. They are both very cute.
Mini dialogue
我有两个
A
你有几个苹果？
Nǐ yǒu jǐ gè píngguǒ?
How many apples do you have?
B
我有二个苹果。
Wǒ yǒu èr gè píngguǒ.
I have two apples.
第二名
A
你跑步得了第几名？
Nǐ pǎobù dé le dì jǐ míng?
What place did you get in the race?
B
我得了第二名。
Wǒ dé le dì èr míng.
I got second place.
Related words and contrasts
contrast
一
yī
one
The number before two.
contrast
三
sān
three
The number after two.
similar
两
liǎng
two (used with measure words)
Often used instead of 二 before a measure word, like 两个.