vacillation /vklen/：犹豫不决；摇摆不定（在两种或多种选择、观点之间来回动摇）。也可指态度或立场的反复变化。
She showed vacillation about whether to accept the job.
她在是否接受那份工作上表现得犹豫不决。
His vacillation between loyalty and ambition ultimately cost him the trust of his colleagues.
他在忠诚与野心之间摇摆不定，最终失去了同事们的信任。
/vklen/
来自拉丁语 vacillare，意为“摇晃、摇摆”，与“走路不稳、左右摇动”的形象有关；后来引申为“思想、决定或立场上的摇摆不定”。
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