Although volcanoes are highly destructive and dangerous, they do help the earth in some ways.

虽然火山具有很大的破坏性和危险性，但是，它们的确以某些方式有助于地球。

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Although volcanoes are highly destructive and dangerous, they do help the earth in some ways.

虽然火山具有很大的破坏性和危险性，但是，它们的确以某些方式有助于地球。

youdao