s. dependent by virtue of youth
a. 未成年的, 未及法定年龄的
n. 缺乏, 不足
1. She is underage and cannot buy alcohol.
她还未成年,不能购买酒精饮料。
2. The club has a strict policy against allowing underage guests.
这家俱乐部对未成年客人有严格的禁止政策。
3. Underage drinking is illegal in many countries.
在许多国家,饮酒年龄未满是违法的。