相关单词近义词 scout 童子军, explore 探测, patrol 巡逻, watch 注视, search 搜寻, observer 观察者, spy 间谍keep an eye out, 警觉, 留心, 密切注意..., study 研究, survey 问卷, probe 调查, exploration 探险, reconnaissance 侦察, look 看, lookout 瞭望台, investigation 调查, inspection 视察, reconnoitre 勘察临近词REC, Reczek 返回 reconnoitered