名词早熟，过早，早开花
1. But despite a booming business, infertility treatment explains only a fraction of the nation's huge and growing problem of prematurity.
2. prematurity是什么意思
2. It's a simple and effective way to put a human face on the issue of prematurity.
3. But the high concentration of oxygen in the incubators left him with retinopathy of prematurity, a condition resulting in blindness.