随叫随到的小公共汽车 jitney
一些人是需要被邮件随叫随到的。
Some people might need to be reachable by email throughout the day.
你应该像医生一样，保持随叫随到的状态。
在设备运行的整个时期，出现技术问题，供方做到随叫随到的。
As for the technical problems during the whole process of the equipment performance, the provider will be always within call.
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