A: Ah... Gosh! my compass has broken down.
B: Oh，that's nothing could be worse than it
C: Hey, guys. Don't show your desperate expression. I have other ways out of it
A: you mean that you have ways to escape from the desert without a compass?
C: Yeah. you see, we can use of the polar star to judge the direction. Cause it always shines bright in the night sky. By Looking at it, we'll know where's the north
B: Haha, I actually forget it
A: Great. And what should we do next?
C: For the sake of reserving sufficient physical strength,we should better shelter in the shade under the sun.Then set off as soon as the polar star rises.
A/B: Got it!
好累啊，你这真不好弄。以上是我的构思，是说指南针坏掉，利用北极星来走出沙漠
