站在跳台上时，他突然感到一阵眩晕。
He felt a sudden ___qualm of dizziness when standing on the diving board.
虽然决定辞职，但他心里还是有些不安。
He felt some ___qualms about his decision to quit the job.
闻到那股怪味后，她突然感到一阵不安和恶心。
After smelling the strange odor, she had sudden ___qualms and felt sick.
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