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introduction (from abroad)
transmission (through successive generations); being handed down (from generation to generation); being passed down
この刀は先祖伝来の家宝として大切に保管されている。
This sword is carefully stored as an ancestral heirloom.
仏教が日本に伝来したのは六世紀頃のことだった。
Buddhism was introduced to Japan around the 6th century.
この技術は中国から伝来したものだと言われていた。
It is said that this technology was transmitted from China.