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单词 BB
释义
BB 1 (bēbē)
n.
A pellet or ball, usually of steel coated with copper or nickel, that measures 7/40 of an inch (0.44 centimeter) in diameter, used in air rifles.

[From BB, a size of birdshot pellet intermediate between B and BBB that measures 17100 of an inch (0.43 centimeter) in diameter (from the fact that BB guns originally fired birdshot pellets of this size).]
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更新时间:2025/3/22 10:26:14