Suzhou and Venice are sister cities.

尼斯是姐妹城。

The city in 1995 and Shanghai became sister cities.

1995年该市与上海结为友好城市。

Last week, Sister-cities Summit was held in Hawaii, representatives from Guangdong and Hainan Province attended the summit as the sister states of Hawaii.

一周前，国际姐妹城市峰会在夏威夷召开。作为夏威夷州的友好省州，中国广东省和海南省均派代表出席了此次会议。