1.  staleness
2.  lose heart
3.  feel discouraged
4.  air leakage
5.  give up the ship

• 1. 泄气: lose heart | Discouraged | become flat | venting
• 2. 使泄气: bring down | discourage | military discipline | pout
• 3. 泄气阀: air escape valve | snifting valve | gas bleed valve | air release valve

更多释义

• 1.这不过是尺蠖之屈，不要泄气。
  It's just a temporary setback. Don't be discouraged.
  dict.yoduao.com
• 2.她完全泄气了。
  She was totally discouraged.
  dict.yoduao.com
• 3.他开始感到泄气了，他的力气正在消失，他呼吸越来越费劲。
  He was beginning to feel discouraged, his strength was leaving him, and his breathing was becoming more and more labored.
  dict.yoduao.com

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