These volcanoes are so explosive that they burst open in a single big crack, leaving behind a vast hole, the caldera.
这些火山具有极强的爆发性，以至于在它们从一条大的裂缝中喷涌而出，留下了一个巨大的洞，也就是火山口。
2
So there would have been an open fire inside the house with only one hole in the roof to let the smoke out.
所以，房子里本该有一处明火，屋顶上只有一个洞让烟冒出来。
3
"If you sleep with your mouth open, she will be able to see the tooth hole," said Sammy. The class laughed. Come on! But that just gave me a great idea! "How did you get the Tooth Fairy to leave the money?"