指对在交易所上市的一或数种证券从事交易的做市商。
Market makers in one or more selected securities listed on an exchange.
在季节性流感流行期间，约90%的死亡发生在年老体弱者身上，他们常常患有一种或数种慢性病。
During epidemics of seasonal influenza, around 90% of deaths occur in the frail elderly, who often suffer from one or more chronic medical conditions.
两组研究均发现大多数蚊子嗅觉感受器可以对许多不同的气味产生反应而少数的感受器仅对一种或数种气味起反应。
Both studies found that most mosquito receptors are "generalists" that react to a number of different odors while a few are "specialists" that respond to a single or small number of odors.
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