external

/ɪkˈstərnəl/

happening or arising or located outside or beyond some limits or especially surface

中文释义：外部的；外面的；外来的

The building's external walls need to be repainted every five years.

这栋建筑的外墙需要每五年重新粉刷一次。

External factors such as weather can significantly affect crop yields.

天气等外部因素会显著影响作物产量。