Chinese phrase
对不起，〜 duì bù qǐ 〜
Meaning
sorry ___
When to use it
It is used to apologize for a mistake or problem. It is common in everyday conversation and sounds polite.
Example dialogue
对不起，我来晚了。 duì bù qǐ wǒ lái wǎn le
Sorry, I'm late.
没关系，下次注意就好。 méi guān xì xià cì zhù yì jiù hǎo
It's okay, just be more careful next time.