Chinese phrase
〜期限是多久？ 〜 qī xiàn shì duō jiǔ
Meaning
How long is ___ good for?
When to use it
Asks how long an item remains usable. It often refers to food, drinks, medicine, or other items with a stated expiry date. The tone is neutral and practical.
Example dialogue
这瓶牛奶的期限是多久？ zhè píng niú nǎi de qī xiàn shì duō jiǔ
How long is this bottle of milk good for?
还有三天，开封后两天内喝完比较好。 hái yǒu sān tiān kāi fēng hòu liǎng tiān nèi hē wán bǐ jiào hǎo
It is good for three more days, but it is best to finish it within two days after opening.