早产儿年轻时死亡率较高

词汇讲解：

1. premature adj. 过早的, 提前的, 未到期的; 早产的
例句：The premature baby is doing well.
那个早产的婴儿很健康。

2. survive vi. 幸存, 活下来
例句：These plants cannot survive in very cold conditions.
这些植物在严寒中不能存活。

3. mortality n. 大量死亡；死亡率
例句：Poor hygiene led to high mortality among children.
卫生条件很差，道致了儿童的死亡率很高。

4. pregnancy n. 怀孕; 妊娠
例句：This was her second pregnancy.
这是她第二次怀孕。

5. surprising adj. 使人惊讶的, 出人意料的, 惊人的
例句：It was surprising that he finished writing a novel in only twenty days.
他在二十天内写完了一本小说, 真令人吃惊。

6. decrease v. (使)缩短; 减小, 减少
例句：The traffic accidents in the city decreased last year.
该城市去年交通事故减少了。

7. cumulative adj. 累积的, 渐增的
例句：This drug has a cumulative effect.
这种药有渐增的效力。

8. manifest vt. 清楚表示; 显露
例句：Her actions manifested a complete disregard for personal safety.
她的行动表明她全然不顾个人安危。

9. obesity n. 肥胖;过胖
例句：Sugar and fat can more easily lead to obesity than some other foods.
糖和脂肪比其他食物更容易导致肥胖。

10. offset vt. 抵消, 补偿
例句：Their wage increases would be offset by higher prices.
他们增加的工资会被物价上涨所抵消。