復(fù)數(shù)：age limits

n.regulation establishing the maximum age for doing something or holding some position

1. There is an age limit of 18 for participating in the competition.
   參加比賽的年齡限制為18歲。
2. The new law sets an age limit of 21 for purchasing alcohol.
   新法律規(guī)定購買酒精的年齡限制為21歲。
3. Some organizations have an age limit for volunteers, requiring them to be at least 16 years old.
   一些組織對志愿者設(shè)定了年齡限制，要求他們至少要16歲。