这家糖厂是一家知名的精炼商，将粗糖加工成纯净的白糖。

This sugar factory is a well-known ___refiner that processes raw sugar into pure white sugar.

这台炼油设备每天可以处理上千吨原油。

This oil ___refiner can process thousands of tons of crude oil daily.

作为一位经验丰富的食谱改良师，他擅长调整配料比例让菜肴更美味。

As an experienced recipe ___refiner, he specializes in adjusting ingredient ratios to make dishes tastier.