一个儿童或者青少年的体质指数年龄比率表述了其BMI与同龄其他孩子的相对比较值。
A child or teen's BMI-for-age percentile shows how his or her BMI compares with other boys and girls of the same age.
不管中心黑洞是我们太阳质量的几百万倍还是几十亿倍，对不同年龄和大小的星系，这一比率都是相同的。
The ratio is the same for galaxies of all ages and sizes, whether the central black hole is a few million or many billions of times the mass of our sun.
女性糖尿病患病比率上升了79%，这可能是由于部分(年龄)段的预期寿命缩短所引起的。
Women's rate of diabetes jumped 79%, something that has contributed to a decline in life expectancy among some groups.
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