“射弹孔”常见的英文表达是 bullet hole 或 projectile hole(“projectile”更强调投射物,涵盖范围更广,但在指枪弹造成的孔时,“bullet hole”更常用)。
例如:
The wall was riddled with bullet holes.(墙上布满了弹孔 。)
There are several projectile holes on the target board.(靶板上有好几个射弹孔。)