3 sentences

1. 地图上用红点标明了主要的旅游景点。

   dì​tú shàng yòng hóng diǎn biāo​míng le zhǔ​yào de lǚ​yóu jǐng​diǎn.

   Major tourist attractions are marked with red dots on the map.

   Source: Dong Chinese Dictionary

2. 他在社交平台的个人资料上标明自己是“不分”。

   tā zài shè​jiāo píng​tái de gè​rén zī​liào shàng biāo​míng zì​jǐ shì“ bù​fēn”.

   He identified himself as "versatile" on his social media profile.

   Source: Dong Chinese Dictionary

3. 每件商品上都标明了价格。

   měi jiàn shāng​pǐn shàng dōu biāo​míng le jià​gé.

   The price is clearly marked on every item.

   Source: Dong Chinese Dictionary