关键词：five by five 准备就绪，状态良好
短语释义：今天我们要学的短语是five by five.The term comes from old radio slang. When communicating over radio, the operator would report the strength and clarity of the signal on a scale of 1 to 5 each. 这种说法源于无线电通信的操作术语，话务员请求对方站对我方信号质量做出报告时会用到两个数字，一是信号强度，二是信号清晰度和抗干扰能力，这两个数字都是用从1到5来衡量的。Therefore, if a radio operator described the signal as "five by five" it meant it was both loud and clear. 因此当话务员用five by five来描述信号时，这说明设备运行良好，信号很强而且很清晰。到了七十年代，five by five逐渐不再局限于无线电通信领域，成为了一句日常用语，表示“准备就绪，状态良好”。

情景领悟：
1. I sincerely hope everything is five by five.
我真心的希望一切都好。
2. A: How are you going on these days?
你最近怎么样？
B:Five by five, as we used to say in the old radio days.
一切都还好，就像过去在收听旧收音机的日子里听到的那样。
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