名词
中文翻译：不可克服的疲劳同义词
同义词：
['insurmountable fatigue', 'unbearable fatigue']
例句：
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1. The climb was so exhausting that he felt like he could never surmount this mountain again.
这次爬山太累人了，他觉得再也爬不上这座山了。
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2. Despite the long hours of work, she remained undeterred and continued to strive for success despite the insurmountable challenges.
尽管工作时间长，但她仍然坚持不懈，努力克服困难取得成功。
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3.The scientist's research on renewable energy sources has led to a breakthrough in overcoming insurmountable obstacles in the field of energy production.
科学家在可再生能源方面的研究取得了突破，成功克服了能源生产领域难以逾越的难题。