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びっくり， ビックリ， 吃驚， 喫驚
1. to be surprised, to be amazed, to be frightened, to be astonished, to get startled, to jump
2. surprise (e.g. surprise party)
感到惊讶、感到惊奇、感到害怕、感到惊愕、受到惊吓、跳起来
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思わず， おもわず
1. unconsciously, involuntarily, instinctively, reflexively, spontaneously, unintentionally, in spite of oneself
不自觉地，不由自主地，本能地，反射性地，自发地，无意间，尽管自己不愿
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叫ぶ， さけぶ
1. to shout, to cry, to scream, to shriek, to yell, to exclaim
2. to clamor (for or against), to clamour (for or against)
喊叫，呐喊；喧嚷(支持或抗议)