The teacher is completely discomfit by the unexpected question.
老师被那意外的问题完全扰乱(楞住了).
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To cause to feel chagrin ; mortify or discomfit.
使懊恼,使受屈辱,使窘迫.
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Flash forth lightning, and scatter them; Send forth Your arrows, and discomfit them.
6求你发出闪电, 使仇敌四散; 射出你的箭, 使他们溃乱.
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