Exercise and Health (Ⅰ)
A heart attack is usually caused by an obstruction of the blood vessels on the outside of the heart that supply oxygen to the heart muscle.
心脏病突发通常是由于为心肌供氧的心脏表面的血管产生阻塞而造成的。
on the outside of : ….的表面
outside : (1 ) n. 外部, 外面
----- It looked tiny from the outside , but inside it was nice and roomy.从外部看它显得很小, 但其实里面漂亮又宽敞.
(2) adv. 在户外, 在外面
-----It’s quite dark outside.外面很黑.
(3) prep. 在….的外边/ 外部
----- Please , wait outside the door.请在门外等着.
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