a. showing regard for others in manners, speech, behavior, etc.
a. 有礼貌的, 文雅的, 客气的, 有教养的
1. It is polite to say "thank you" when someone helps you.
当有人帮助你时，说“谢谢”是礼貌的。
2. She always speaks in a polite manner, which makes everyone feel comfortable.
她总是以礼貌的方式说话，这让每个人都感到舒适。
3. Being polite can help you make new friends.
礼貌可以帮助你交到新朋友。