慢速英语:科学家成功3D打印全尺寸心脏模型

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3D printing – n. the process of printing a solid object from a digital model by printing many separate layers of the object

function – n. the way in which something works or operates

manipulate – v. to control something using the hands

gelatin – n. a clear substance made from animal bones that is used to make some foods and other substances

seaweed – n. a type of plant that grows in the sea

suture – n. a stitch used to sew up a cut or wound in a person's body

valve – n. a part of the heart that controls the amount of blood flow

artery – n. a thick tube that carries blood from the heart to other parts of the body

hurdle – n. a problem that has to be dealt with before further progress is made

groundwork – n. work that is done in preparation for work that will be done later