幸运的是,什么都没发生。
Fallstreak holes happen usually in high or mid-level clouds, which are composed of water droplets that are already at a temperature colder than freezing.
雨幡洞云通常发生在中高空云层。那里的水滴温度低于冰点。
These ‘supercool’ droplets are frozen when – for example – a plane passes through the cloud and brings with it ice crystals which causes the water droplets to freeze. This process is known as seeding according to Science Magazine.
这些过冷液滴在遇到小冰晶时会冻结。例如一架飞机飞过后就会如此。《科学》杂志把这一过程称为“播种”。
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