to feel weakfeeling listless
没劲儿 to feel weakexhaustedfeeling listlessboringof no interest 没有劲头儿 to feel weakfeeling listless 猛劲儿 to dashto put on a spurtto redouble efforts ..
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to feel weakfeeling listless
感到虚弱，无精打采
以上为机器翻译结果，长、整句建议使用 人工翻译 。