The bus tours are available no matter what the weather is.
无论天气如何,都可以乘公共汽车观光。
Headphones are available on the bus and these are easy to operate.
巴士上都配备有耳机,操作起来很方便。
The consumers communicate with the logical bus, which keeps track of the available services from the providers, and in turn calls the appropriate provider.
使用者与逻辑总线进行通信,而后者跟踪来自提供者的可用服务,并负责调用恰当的提供者。
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