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great success; huge success
企画は大成功に終わった。
The project ended in great success.
商品開発が大成功を収め、会社が話題になった。
The product development was a huge success, and the company gained a lot of attention.
初めてのライブは大成功で、観客に大きな感動を与えた。
The first live concert was a great success and moved the audience deeply.