at the age of
教育科学

        用法at the age of中的at是介词,表示时间点,强调某一时间的情况。该短语还可以用其他方式表达,如:at the age of twelve(在十二岁时),与at twelve(years old) 和when sb. was twelve (years old)相当。例如:① He was very clever and at the age of seventeen he went to ......（本文共 397 字）     [阅读本文] >>