You are sitting now in your office - six clerks are all within call.

你正坐在办公室里—你可以随时给六名职员安排任务。

When the two ships were within call, their officers exchanged messages.

当这两条船靠得很近时，他们的高级船员交换了信息。

You, reader, put this matter to a test: You are sitting now in your office—six clerks are within call.

不妨做个试验：你此刻坐在办公室里，有六个职员在等候安排任务。

As for the technical problems during the whole process of the equipment performance, the provider will be always within call.

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。

My commercial vehicles are only face to more than one year contract client, client can use car by yourself at weekend, (within call).

本人车辆只对一年以上有合同的客户，非工作日可自驾，随叫随到。