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1. Oxford Dictionary

   beta blocker

   英式

   • n.
     any of a class of drugs which prevent the stimulation of the adrenergic receptors responsible for increased cardiac action, used to control heart rhythm, treat angina, and reduce high blood pressure.

   • noun: beta blocker, plural noun: beta blockers

2. • 更多解釋

   beta blocker

   • IPA[ˈbādə ˌbläkər]

   美式

   • n.
     any of a class of drugs that prevent the stimulation of the adrenergic receptors responsible ...

   Oxford American Dictionary