submarine caldera的用法和樣例：
例句
- The mountain is encircled by the doughnut-shaped depression of the caldera.
山為環(huán)形的破火山口洼地環(huán)抱著(zhù)。 - Daqiaowu uranium deposit oaurs in the contact Zone of quartz porphyry massif and explosive breccia chimney in the Mesozoic Mengshan caldera, belonging to porphyry type.
大橋塢斑巖型鈾礦床產(chǎn)于中生代蒙山破火山口中一石英斑巖體的內外接觸帶及其隱爆角礫巖筒中。
