Walk (on) a tightrope: to be in a situation where one must be very cautious 走鋼索,(必須非常小心的)危險處境 (tightrope: a rope or wire high above the ground that someone walks along in a circus) Examples: 1) I’m walking a tightrope at the moment; one more mistake and I may very well lose my job. 2) The general...Continue reading