探索世界上最大的火山口,看看上面有什么。我听到了嘶嘶声,感觉到了隆隆声。我看了下表。准备,开始,5……4……3……2……1!突然间,热水和蒸汽从地下喷涌而出,水雾喷到40米高的空中。我总能准确地判断老忠实泉的喷发。它是一个间歇泉,大约每90分钟喷一次。老忠实泉喷发的原因就深藏在我们脚下。我们正站在世界最大的火山之一的顶部。这座火山如此之大,被我们称为超级火山(尽管我们看不到它)。它 Explore the world’s largest crater to see what’s on top. I heard a hiss, I felt a rumbling sound. I read the table below. Preparation, start, 5 ... 4 ... 3 ... 2 ... 1! Suddenly, hot water and steam gushed out of the ground and the mist was sprayed into the 40-meter-high air. I can always accurately judge the eruption of Old Faithful. It is a geyser, sprayed every 90 minutes. The reason for the old faithful eruption lies deep under our feet. We are standing at the top of one of the largest volcanoes in the world. The volcano is so large that we call the super volcano (though we can not see it). it