飘忽不定

眼神飘忽不定,看起来有很迷离

Eyes drifting, looks very dazed

我注意力难以集中,思绪飘忽不定,一句话也没听进去

Hard to focus attention, thoughts drifting, didn't hear a word

血压飘忽不定,未必就是高血压

Blood pressure fluctuates, doesn't necessarily mean high blood pressure

因为我真的成绩飘忽不定,考试可咋办

Because my grades are really fluctuating, what to do about the exam