That's just what happened in 1908 at Tunguska, Siberia.
1908年发生在西伯利亚通古斯的就是这样的撞击事件。
And indeed, nitrates are found in snow around the Tunguska blast.
确实，在通古斯卡爆炸冲击波的范围内的雪中发现硝酸盐的存在。
I didn't know what the Tunguska incident was. I had to look it up.
我不知道什么是通古斯大爆炸，不得不去网上查了查。
A comet may have been the cause of the Tunguska event in Russia in 1908.
1908年可能是一颗彗星导致了俄国通古斯事件。
The meteorite which devastated Tunguska is now estimated to have been about 50 metres across.
据猜测，毁灭通古斯的陨石的直径有近50英里。
The Tunguska event included seismic waves and infrasonic disturbances that were recorded around the world.
通古斯爆炸包含了地震波和次声扰乱，被世界各地记录下来。
In the century since 1908, new expeditions have returned to Tunguska again and again to collect evidence from ground zero.
自1908年以来，一个世纪中不断有探险队员来到通古斯河流域的“零地带”搜寻证物。
In the event, it may have yielded 57 megatons - which would have made it just under four times as destructive as the Tunguska meteorite.
这次爆炸事件中，可能产生了5700万吨的爆炸力——使它所造成的破坏力大概仅次于通古斯流星爆炸的四倍。
An asteroid or comet fragment around 60 meters across is believed to have been behind the Tunguska Event, a powerful explosion that took place over Russia in 1908.
据信，1908年俄罗斯上空发生的强劲爆炸——通古斯大爆炸背后，有一个直径约六十米的小行星或慧星碎片。
An asteroid or comet fragment around 60 meters across is believed to have been behind the Tunguska Event, a powerful explosion that took place over Russia in 1908.
据信，1908年俄罗斯上空发生的强劲爆炸——通古斯大爆炸背后，有一个直径约六十米的小行星或慧星碎片。
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