VOA慢速英语:3-D Printed Model Heart Guides Surgeons, Saves Lives

cardiac – adj. of or relating to the heart

CAT scan – n. a picture of the inside of a part of your body that is made by a computerized machine

defect – n. a problem or fault that makes someone or something not perfect

MRI – n. magnetic resonance imaging; a method used to produce images of the inside of a person's body by means of a strong magnetic field

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