weight loss
noun [ C or U ]
（人或动物）体重减轻
the fact of a person's or an animal's body weight becoming less
Weight loss can be achieved by balancing a healthy level of physical activity with eating a nutritious diet. 减轻体重可以通过适当锻炼和营养用餐之间达成平衡来实现。
Such huge weight losses are not easy to sustain. 这样大幅的体重减轻是不能持久的。