B2 of, on, for, or coming from the outside外面的;外表的;来自外部的
More examples
This medicine is for external use only and should not be taken internally.
The external part of the ear is far less important than the internal parts.
If the device, for example a printer, has to be plugged into your computer, it is called an external device.
There are no external symptoms of the disease for several weeks.
These animals, known as arthropods, all have segmented bodies and an external skeleton.
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