Avoid steep ravinesas, it is not easy to locate oneslef in this topography. Head for a high spot if you fail to identify your location.是什么意思_Avoid steep ravinesas, it is not easy to locate oneslef in this topography. Head for a high spot if you fail to identify your location.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句