炼

炼(煉、鍊) [liàn] 动

1. ■ （用加热等办法使物质纯净或坚韧） refine; smelt; work:

提炼 refine; extract; abstract;

炼铁 smelt iron

2. ■ （烧） temper with fire:

烈火炼真金。 Pure gold is tempered in a blazing fire.

3. ■ （使词句精美简洁） polish:

炼字炼句 try to find the right word and the best sentence