恐怖分子在邮局安放了一枚炸弹。 The terrorists planted a bomb in the post office.
固定物牢固地安放在一个地方的东西 Something securely fixed in place.
地雷，水雷一种用来摧毁敌军部队、船舰、碉堡或装备的爆破装置，通常安放在隐蔽处，由于接触、靠近或定时而引爆 An explosive device used to destroy enemy personnel, shipping, fortifications, or equipment, often placed in a concealed position and designed to be detonated by contact, proximity, or a time fuse.
恐怖分子在火车站安放了一枚50磅重的炸弹。 Terrorists placed a 50-pound bomb in the railway station.