The national academy of sciences defines significant weight loss as just 5 % or more of your initial body weight 答：国家自然科学学院定义显著减肥为体重减轻5或者更多。
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Another method to express significant weight loss is as a reduction of your bmi by one of more points . " long term " means one year or more 另外一个衡量显著减肥的标准是bmi降低几分之一，长期减肥的长期是指至少一年以上。
