帮我翻译一下好么,谢谢
itcantakeaslongaseightdaystoripupropeladdersandtoestablishsupplybasesbeforeadescentca...
it can take as long as eight days to rip up rope ladders and to establish supply bases before a descent can be made into a very deep cave.这里的descent是指的名词,下降?到底社么时候能用被动啊,反正除了自己外,都用被动么,
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