| 单词 |
ball lightning |
| 释义 |
ball lightningnoun [mass noun]A rare and little known kind of lightning having the form of a moving globe of light several centimetres across which persists for periods of up to a minute.In nearly all reported cases, the observers saw another form of lightning flash before seeing ball lightning....- Some researchers believe that ball lightning occurs when lightning bolts touch down on the Earth's surface.
- Extremely rare, there are few pictures of ball lightning, which is usually described as a floating sphere, often about the size of a basketball.
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| 随便看 |
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