Crater
火山口
A crater is a big hole in the ground.
火山口就是地面上的大洞lMz;,aGaxLT0AvJg.pa。
Volcanic activity can make craters.
火山活动会形成火山口|zb;0&SlS=ZDh^。
After a volcano erupts, we see a huge hole on the top of the volcano.
火山喷发后，火山顶上会有个大洞E5k8PBp8eX.;W。
If there is no volcanic activity for a long time, snow and rainfall stays inside the hole.
如果长时间没有火山活动，雪和雨水就会存留在洞中F)|W5Rk,PpuJF+^d7[l。

Then the hole becomes a huge lake.
之后这个洞就成了大湖ZYdJFoASZDkQfJsbu=M。
It is called a crater lake.
我们称之为火山口湖yY&k]@Pp6si*QX。
Diamond Lake in Oregon, U.S.A. is an example of a crater lake.
美国俄勒冈州的“钻石湖”是火山口湖的典例zkjpsSsu%0jP。
Is there a crater lake in your country?
你的国家有火山口湖吗？
Have you seen any crater lakes before?
你之前有见过火山口湖吗？