a kink in a rope的用法和样例：
- By 2005, though, the line had a kink in it.
- But even if his numbers are right that is just a kink in a graph of killing that has risen for most of the past four years.
- Will you please tie a rope in a firm knot?
- He asked me to tie a knot in a rope.
- She got a kink in her head to swim across the Chesapeake Bay alone.