VOA慢速英语:3D打印如何帮助美国队赢得金牌

dominate – v. to have power or control over someone or something

track – n. an area set aside for racing

sled – n. small steerable vehicle used for coasting down snow-covered hills or down a track

mold – n. container used to give its shape to something that is poured or pressed into it

aerodynamics – n. a science that studies the movement of air and the way objects move through air

optimize – v. make (something) as good or as effective as possible

adjust – v. to make a small change to something

fit – v. to be in agreement with; to be in the exact size or shape of something

boot – n. a strong shoe that covers your foot and part of your leg