The customer service representative remained polite even when the caller became angry and impatient.

即使來電者變得憤怒又不耐煩，客服專員仍然保持禮貌。

Please send a polite reminder to clients who have not yet paid their invoices.

請寄一封客氣的提醒信給尚未支付發票款項的客戶。

The flight attendant politely asked passengers to fasten their seat belts before landing.

空服員有禮貌地請乘客在降落前繫好安全帶。