Admonish your friends in private, praise them in public.
在私底下要忠告你的朋友,在公开场合又表扬你的朋友。
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.
有时需要花费整整8天时间来搭起绳梯,建立供应基地,然后才能到一个很深的洞穴里。