BB：弹丸

“Ball Bullet”常简写为“BB”，这种缩写形式便于快速书写与日常使用，多见于军事领域和相关专业机构中。其对应的中文含义是“弹丸”，通常指代球形或类似形状的发射体。在军事术语和武器系统中，BB常用来表示特定规格的子弹或训练用弹药，具有简洁、通用的表达效果。

Kids knew not to go into his yard to pick a delicious apple, even off the ground, because old Dawson, they said, would come after you with his ball bullet gun.
小孩们知道不能到他的院子里摘美味的苹果，甚至掉在地上的也不能捡，因为据他们说，老道森会端着他的弹丸(BB)猎枪跟在你后面追。
In this paper, the finite element simulation for the penetration of steel ball and bullet into gelatin which was established by the nonlinear finite element software ANSYS / LS-DANA was the research object.
本文利用非线性有限元软件ANSYS/LS-DANA，以钢球和手枪弹侵彻明胶靶标的有限元模拟为研究对象开展研究。
The goal at Birmingham too, he was coming out to deal with a situation and the ball ricocheted, went like a bullet, hit his hands and went into the net.
伯明翰的进球也是如此，他出击处理险情，球弹了起来，就像子弹一样击中了他的手，飞入网窝。
A semi-closed type lock body and a movable ball body form the latching state with the support of a spring and a bullet lock core.
它由半封闭式锁体和活动球体在弹簧和弹子锁心的支顶下形成闭锁。

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