Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
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
