Please print the final contract in black ink and leave two copies at reception.

請用黑色墨水列印最終版合約，並在櫃檯放兩份副本。

The airline lost my black suitcase, so I filed a claim at the service desk.

航空公司弄丟了我的黑色行李箱，所以我到服務櫃台提出申報。

All new hires should wear black trousers and a white shirt on their first day.

所有新進員工第一天上班都應穿黑色長褲和白色襯衫。