2 sentences

1. 这里的“三”是基数，而“第三”是序数。

   zhè​lǐ de“ sān” shì jī​shù, ér“ dì​sān” shì xù​shù.

   Here, 'three' is a cardinal number, while 'third' is an ordinal number.

   Source: Dong Chinese Dictionary

2. 该项目的补贴基数由当地政府决定。

   gāi xiàng​mù de bǔ​tiē jī​shù yóu dāng​dì zhèng​fǔ jué​dìng.

   The base amount for the project's subsidy is determined by the local government.

   Source: Dong Chinese Dictionary