②原因
Reasons for
那末,我们应该怎样解释这类现象呢?这些是神怪现象吗?显然不是。这些现象实际上都是由旋风所引起的。旋风又叫做回风,古人早已知道它的厉害了。
So, how should we explain this kind of phenomenon? Are these supernatural phenomena? Obviously not. These phenomena are actually caused by cyclones. Whirlwind is also called return wind. The ancients knew it was powerful.
明代《管窥辑要》一书,引唐代天文学家李淳风的话说:“回风卒起,而圜转扶摇,有如羊角,向上轮转,有自上而下者,或磨地而起者,总谓之回风。”当回风刮起的时候,飞沙走石,平地而起,直冲到高空中去。因此,地面的东西往往会被刮到天上,刮到很远的地方,然后又落到地面上来。这样就形成了所谓钱雨、金雨等等奇怪的现象。
In the Ming Dynasty, Li Chunfeng, an astronomer in the Tang Dynasty, was quoted as saying: "the return wind blows up, while the circle turns to support the swing, just like a sheep's horn, turning upward, and the top-down or the ground grinds up, which is called the return wind." When the return wind blows, flying sand and rocks, rising from the ground, straight into the air. As a result, things on the ground are often blown to the sky, far away, and then to the ground. In this way, the so-called money rain, gold rain and other strange phenomena are formed.
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