The Observer pattern is associated with a single source of events, however, whereas the Reactor pattern is associated with multiple sources of events.
不过，观察者模式与单个事件源关联，而反应器模式则与多个事件源关联。
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A new equipment-column type suspension reactor with multiple trays, has been developed for the condensation of phenol with acetone in the production of BPA instead of conventional fixed bed reactor.