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A pacemaker is a small device that doctors place in people with an abnormal heartbeat.

VOA: special.2010.06.02

We've seen a boom in building in the United States that is at a record level, except for that one Korean War blip, and so I think it's a highly abnormal situation that we've been in.

所以美国出现一波建造新房的浪潮,规模空前,仅次于朝鲜战争时期,我认为这是极不正常的

耶鲁公开课 - 金融市场课程节选

A Pap test looks for abnormal cervical cells that could become cancer.

VOA: special.2009.11.25

Abnormal a-syn wasn't detected for 164 days in the second group and was undetectable in controls.

WSJ: Exercise Benefits vs. Joint Concerns

Minute quantities of abnormal a-syn from older diseased mice exhibiting neurological symptoms were injected into one mouse group.

WSJ: Exercise Benefits vs. Joint Concerns

Researchers in Pennsylvania conducted experiments with mice bred to develop neurological symptoms associated with abnormal a-syn after about 12 months.

WSJ: Exercise Benefits vs. Joint Concerns