To achieve great success in one's career or rise to a high position; to make a significant advancement in one's studies or career.
经过多年的努力，他终于在自己的领域里获得了突破性的成就，这真可谓是鱼升龙门。
After years of diligent effort, he finally achieved a breakthrough in his field, which can truly be described as a fish ascending the dragon gate.
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