once-enthusiastic scientific ambition
definitions
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A drive or desire to achieve scientific goals that was previously characterized by great excitement or passion but has since diminished, faded, or been lost.zh: 曾经热衷的科学雄心
examples
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After years of repetitive failures, his once-enthusiastic scientific ambition had turned into mere resignation.
经过多年的重复失败,他曾经热衷的科学雄心已变成了仅仅是无奈。