这才是教授水平的作业。

来源: 于 2011-07-12 20:32:01 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

 

Just had a quick google research, found lead-grey but no led-grey.

I have an impression that "lead" is for a metal and is pronunced as /led/.