If we land a man on the moon, I think someone could surely invent a toaster that works properly.
如果我们能让人类登陆月球,我想一定会有人能发明在月球上还能正常运行的烤面包机。
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。