便 是

(emphasizes that sth is precisely or exactly as stated)
precisely
exactly
even
if
just like
in the same way as

例句

你若安好，便是晴天。

nǐ ruò ān hǎo, biàn shì qíng tiān.

I am relieved that you are safe.

爱便是在你的梦中梦见她。

ài biàn shì zài nǐ de mèng zhōng mèng jiàn tā.

Love is seeing her in your dreams.

出现在

女子无才便是德nǚ zǐ wú cái biàn shì déa woman's virtue is to have no talent (idiom)有奶便是娘yǒu nǎi biàn shì niánglit. whoever provides milk is your mother (idiom)