elephant dugout 大壕沟, 大防空洞 as thick skinned as an elephant 不听人劝; 感觉迟钝 see/get a look at the elephant [美俚]见世面; 开眼界; 经世故 rogue elephant 离群的凶猛野象 show the elephant [俚]展示大都市的景物 white elephant 无用而累赘的东西