YOU SAID:
involves a number of complex data sources
INTO JAPANESE
多数の複雑なデータソースが関係する
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Involves a large number of complex data sources
INTO JAPANESE
多数の複雑なデータソースが関係する
BACK INTO ENGLISH
Involves many complex data sources
INTO JAPANESE
多くの複雑なデータソースが関係する
BACK INTO ENGLISH
Involves many complex data sources
You should move to Japan!