18世纪20年代，军事飞行员驾驶着载满带电沙粒的飞机去袭击云层，尝试人工造雨并且清除雾层。
In the 1920s airplanes loaded with electrified sand were piloted by military aviators who "attacked" the clouds in futile attempts to both make rain and clear fog.
为了解决这一问题，工作人员往造雨机器的容器里倒了一瓶墨水。
To solve this problem, the crew ended up tinting the rain by pouring black ink into the tank of the rain machine.
本书中的这套RAIN销售法，是希望让想成为造雨人的人，有一个可以参考的架构、地图和学习过程。
We developed the rain Selling method to provide a framework, road map, and learning process for those who want to become rainmakers.
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