mature、ripen、age与develop这些动词均有“成熟、长成”之意。
mature : 指生物自然发育成熟或丰满或使其能起正常作用，还可指人获得智慧、经验或变得世故。
- Girls are said to mature faster than boys.
据说女孩比男孩成熟快。 - He matured a lot while he was in college.
他在大学期间成熟了很多。 - It took several years for her ideas to mature.
她的想法经过几年才酝酿成熟。
ripen : 侧重已到长生成熟的顶点。
- The summer sunshine ripened the melons.
在夏日阳光的照射下，瓜熟了。 - These melons are ripening nicely.
这些瓜马上就熟透了。
age : 一般指使人过早成熟，强调已走向衰老。
- She's aged since the last time we met.
她显得比我们上次见面时老了。
develop : 侧重使某一种类或个体潜在本能进化完全，词义比mature广泛。
- It became clear that he wasn't developing like all the other little boys.
显然他没有像其他小男孩那样正常生长发育。 - This exercise is designed to develop the shoulder and back muscles.
这项练习旨在锻炼肩部和背部的肌肉。
