to require effortstrenuous
... 费劲 to require effortstrenuous 费劲儿 to require effortstrenuous 风湿关节炎 rheumatoid arthritis ...
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... 对劲儿 suitableto one's likingto get along together 费劲 to require effortstrenuous 费劲儿 to require effortstrenuous ...
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to require effortstrenuous
需要努力-费力的
以上为机器翻译结果，长、整句建议使用 人工翻译 。