polite

/pəˈlaɪt/

showing regard for others in manners, speech, behavior, etc.

Chinese meaning: 有礼貌的；客气的

It is polite to say 'thank you' when someone helps you.

当别人帮助你时，说声“谢谢”是有礼貌的。

The young man was very polite and held the door open for the elderly woman.

那个年轻人很有礼貌，为老妇人扶着门。