"external aspects" is correct and usable in written English.
You can use it to refer to anything that is outside of something, including physical aspects or characteristics that are visible or not. For example, "The external aspects of our business need to be improved before we can start to see profits."
In practice, internal and external aspects are often linked, and legal provisions of both kinds exist side by side in the same statute.
"One factor is that, in contrast to Western cultures, the external aspects of self (your social status, clothes, gestures, and appearance) versus the inner aspects (thoughts and feelings) matter more here," he explained.
The police and first-response agencies should be working with the hotel industry to devise crisis action plans that would include computer programs detailing all internal and external aspects of hotel building structure, said Michael Coldrick, a London-based security professional and a former explosives specialist with Scotland Yard.
The external aspects of Jewish worship i.e., the form of the service was unacceptable to the newly Westernized members of the Jewish bourgeoisie in both Germany and the United States, whose cultural standards had been shaped by the surrounding society and who desired above all to resemble their Gentile peers.
There will be some challenges related to these internal and external aspects.
External aspects like social plugins (e.g., Facebook's Like button) create extensive privacy issues.
At first Jackson's external aspect began to mirror his internal turmoil over his identity.
In his representations of the physical world, Eakins combined a technical ability to depict the external aspect of things with a probing for the essence of each scene.
It seems they all followed the 1817 manual Hints for the Improvements of Prisons: "Openings [should be] as small as convenient, and the whole external aspect made as gloomy and melancholy as possible".
That is how it turned out.At a time when America is generally turning towards Asia, the re-engagement with Myanmar has been the most striking external aspect of the country's transition.
These are two phases of the same process: the imperceptible Dao shapes the cosmos continuously out of primordial chaos; the perpetual transformation of the cosmos by the alternations of yin and yang, or complementary energies (seen as night and day or as winter and summer), is nothing but the external aspect of the same Dao.
