pencil lead
短语笔心
发音
US
词形变化
pencil leads
复数
pencil leads
释义与例句
n.
-
1.
The material (usually black or dark gray) which allows a pencil to work. Usually a mixture of graphite and smaller amounts of other material, but not actual lead.
笔芯
笔铅
铅笔铅
铅笔芯
可数 不可数