long time no see
US /lɔŋ taɪm noʊ siː/
UK /lɔŋ taɪm noʊ siː/

1.
好久不見, 久違了
a greeting used when you have not seen someone for a long period
:
•
Oh, Sarah! Long time no see! How have you been?
哦,莎拉!好久不見!你最近怎麼樣?
•
After ten years, he greeted his old friend with a warm, "Long time no see!"
十年後,他熱情地對老朋友說:「好久不見!」