3 sentences

1. 大阪和旧金山是姐妹城市。

   dà​bǎn hé jiù​jīn​shān shì jiě​mèi chéng​shì.

   Osaka and San Francisco are sister cities.

   Source: CCMatrix

2. 墨西哥城也是芝加哥的姐妹城市之一。

   mò​xī​gē​chéng yě​shì zhī​jiā​gē de jiě​mèi chéng​shì zhī​yī.

   Mexico City is also one of Chicago's sister cities.

   Source: CCMatrix

3. 旧金山和大阪自1957年以来一直是姐妹城市。

   jiù​jīn​shān hé dà​bǎn zì1957 nián yǐ​lái yī​zhí shì jiě​mèi chéng​shì.

   San Francisco and Osaka have been sister cities since 1957.

   Source: CCMatrix