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。
2
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。
3
The consumers communicate with the logical bus, which keeps track of the available services from the providers, and in turn calls the appropriate provider.