1British Double-black (used in describing grades of pencil lead).
2North American A standard size of lead pellet used in air rifles.
A standard size of lead pellet used in air rifles.
Base on balls.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。