单语范例（未经PONS编辑处理）
Another ingredient of concern is propranolol, a prescription beta blocker that can pose a risk to people with asthma or heart conditions.
www.kelowna.com I put the changed pattern of the migraines down to the beta blocker.
www.telegraph.co.uk She was supplied with a beta blocker medication and was seen by a cardiology registrar four hours after her arrival, at 9.45pm.
www.herald.ie He took a beta blocker, putting the question of hope aside, and for some obscure reason felt quite happy.
en.wikipedia.org This drug is a beta blocker available in the form of oral drops and gels.
www.newsmax.com