external [ɪkˈstɜ:nl]

以下由轻松背单词网站提供

adj.外部的，外面的，外来的；与外国有关的

of, on, for or coming from the outside

External causes become operative through internal causes. 外因通过内因而起作用。
The external features of the building are very attractive. 这座建筑物的外观是很吸引人的。