by the age of的意思是在...年龄时，英文范文如下：
By the age of 25, she had already achieved success in her career and was financially stable. 她在25岁时就已经在事业上取得了成功，并且在经济上很稳定。
希望以上信息对你有所帮助！
by the age of的意思是到...年龄时，常用于某人生至某个年龄时如：By the age of 15, he had learned to play chess like a professional. 到他15岁时，他已学会下棋，棋艺可与专业棋手相媲美^[1][3]^。
by the age of 在英文范文中有例如：By the age of 16, she spoke seven languages fluently, enabling her to work easily in many countries. 在16岁的时候，她流利地说七门语言，使她很轻易地在很多国家工作^[2]^。
by the age of的意思是到某个年龄^[1][2]^。
by the age of 英文范文最新变化是：以至到了（某人）年届四十，具体到某人或某物，对某人或某物的精确时间，由于岁月如梭，一晃而过，很轻易就到那个岁数了。用法：by the age of后面一般接从句或者表示时间的名词，在从句中作时间状语，表示到……岁时。例如：By the age of 15,he had worked hard for ten years and was able to provide a good income for his family^[2]^。