vasoconstrictor是什么意思
音标:英 [ˌvæsəʊkən’strɪktə]美 [ˌvæsoʊkən’strɪktə]
a. 血管收缩的血管收缩神经
any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure
vasoconstrictor的用法和例句：
1.
Caffeine is a vasoconstrictor, keeps the blood vessels from opening back up.
咖啡因能收缩血管 预防血管扩张
