When something is developed, it has grown or changed over a period of time and usually becomes more advanced, complete, or severe.
Their bodies were well developed and super fit.
他们的身体发育良好,极其健康。
If you talk about developed countries or the developed world, you mean the countries or the parts of the world that are wealthy and have many industries.
prosperous , industrialized
developing , undeveloped
This scarcity is inevitable in less developed countries.
在欠发达国家这种匮乏是不可避免的。
If land or property is developed, it has been made more profitable by the building of houses or factories on it or the improvement of existing buildings.
Developed land was to grow from 5.3 to 6.9.
已开发的土地将从5.3增长到6.9。
If a habit, reputation, or belief is well developed, it has become stronger or more noticeable.
a highly developed instinct for self-preservation.
一种高度增长了的自卫本能。