在进入一个很深的岩洞之前，光是装配绳梯和建立供应基地就需要八天之久。(make a descent 下降)

在进入一个很深的岩洞之前，光是装配绳梯和建立供应基地就需要八天之久。(make a descent 下降)的英文翻译

基本释义

• It can take as long as eight days to rig up rope ladders and to establish supply bases before a descent can be made into a very deep cave.