tightrope walker       
noun [ C ] uk/ˈtaɪt.rəʊp ˌwɔː.kər/ us/ˈtaɪt.roʊp ˌwɑː.kɚ/
 走钢丝演员
a person who walks along a tightrope (= a tightly stretched wire or rope fixed high above the ground), usually to entertain other people
  One of the best acts at the circus was an amazing tightrope walker. 马戏团最精彩的节目之一是一位神奇的走钢丝演员。 
 Compare: aerialist
 - More examples
 - Why do tightrope walkers carry a long pole while doing their stunt?
 - She teeters on one leg, arms waving, like a tightrope walker struggling to regain balance.
 - To be a good tightrope walker you need to be a perfect acrobat and have excellent balance.
 - The designer balances modernity and sophistication with the skill of a tightrope walker.