People would fluctuate in mood while facing pressure, and have the feeling of discouragement and is like a run-flat tyre, and sprout the thought or attitude of withdrawal.

• 人在承受一定压力时，会觉得信心动摇，有撑不下去的感觉，于是象轮胎泄了气一样，萌生走不下去的想法或态度。