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to prove fortunate
早めの準備がきっと幸いする。
Early preparation is sure to prove fortunate.
彼女の豊富な実戦経験が今回は幸いした。
Her extensive hands-on experience turned out to be a fortunate thing this time.
普段から築いた人脈が今の成功に幸いしている。
The personal network she has built is contributing to her current success.