打雷-英语听力

[00:03.410]The cause of thunder has been a subject of discussion for a long time.
打雷的原因是一个已经被讨论了很长的时间的话题。 [00:08.780]In the third century BC, it was believed that thunder is caused due to collision of clouds .
在公元前3世纪，人们认为打雷是由于云层碰撞造成的。 [00:16.740]However, the most accepted theory was developed in the 20th century.
然而，最被接受的理论是在20世纪发展起来的。 [00:22.140]According to this theory, the bolts of lightning are very hot, much hotter than the surface of the sun.
根据这个理论，闪电的温度很高，比太阳表面的温度高得多。 [00:29.910]When this high temperature bolt hits the surrounding air,
当高温闪电击中它周围的空气时， [00:33.530]there is an instant expansion of the air, sending out a shock wave, which we hear as a sound of explosion.
空气立即膨胀，发出冲击波，这就是我们听到的爆炸声。 [00:42.030]Thus, thunder is caused due to rapid heating and cooling of the air , near the stroke of lightning Thunder can be dangerous.
因此，打雷是由于空气的迅速加热和冷却而引起的，靠近打雷的闪电可能会有危险。 [00:51.630]In case that you are outside during a thunderstorm,
如果在雷雨期间你在外面， [00:55.630]it is advisable to avoid open fields, beaches and lakes and also stay away from tall trees.
建议避开开阔的田野、海滩和湖泊，也不要靠近高大的树木。 [01:04.370]The safest way is to get inside your home or stay in the car.
最安全的方法是回到家里或者呆在车里。