她砰的一下关上门，随手锁上了。She slammed the door and locked it behind her.早上你下楼的时候，前门大概是锁上的吧？Presumably the front door was locked when you came down this morning?每次都要锁上车库。Always lock your garage....
有膛线的武器最早可以追溯到15世纪.Rifled firearms date at least to the 15 th century.一种火器;有膛线炮的或在来复枪内有内螺旋形槽线的.The parts of a gun that make up the breech.设计成一定形状的射弹,通过制有膛线的枪管发射.BULLET a shaped projectile designed to be shot trough the ri...