详细解释:n. 水陆两用车
详细解释：
amtrac 也作 am.track
n.（名词）A small, flatbottomed amphibious vehicle that moves by means of finned tracks and is used to carry troops from ship to shore.水陆两用履带车辆：一种小型平底水陆两用车，靠履带带动前进，用来把军队从船上运到岸上
来源：am(phibious) am(phibious)trac(tor) trac(tor)