black lead 详细解释

black lead

n. 石墨(笔铅)

英英释义

名词 black lead:

used as a lubricant and as a moderator in nuclear reactors

同义词:graphite, plumbago

动词 black lead:

cover with graphite

同义词:blacklead

补充

black leadblack lead英:[led] 美:[lɛd]1.石墨,笔铅