1 sentence for 研 (yán — to grind)

1. 在美国，非常精细研磨的玉米粉也被称为玉米粉。

   zài měi​guó, fēi​cháng jīng​xì yán​mó de yù​mǐ​fěn yě bèi chēng​wéi yù​mǐ​fěn.

   In the United States, very finely ground cornmeal is also referred to as corn flour.

   Source: CCMatrix