(을/를) 통해(서) / (을/를) 통하여(서) can be translated as “through, by way of” and is used with nouns to indicate “sources of information” such as persons, institutions, activities, etc.
텔레비전을 통해서 한국 문화에 대해 많이 배우게 됐어요. I ended up learning a lot about Korean culture through television.
친구를 통해서 민주의 소식을 들었어요. I got news of Minjoo through a friend.
친구를 통해 민지에게 편지를 보냈어요. I sent a letter to Minji through a friend.
성공은 근면을 통해서만 얻을 수 있다 You can only achieve success through hard work.
Reference: King, R., Yeon, J., & Lee, I. (2015). Continuing Korean (Second ed.): Tuttle Publishing.
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