英语语法分析

The rifles were well-concealed in the false-bottomed kitbags but for some reason the rifle was found and the customs man, running from the scene, sounded the alarm.

步木仓被很好地藏在行李箱的底部暗格中，但是不知为何地被发现了，海关官员迅速逃离现场并打开了警报。