caldera的复数形式怎么写

The mountain is encircled by the doughnut - shaped depression of the caldera.山为环形的破火山口洼地环抱着.Leaving the visitor center, follow Crater Rim Drive for 11 miles encircles Kilauea Caldera.离开游客游览中心, 随后驾车来到距离11英里环绕基拉韦厄火山口陨石坑周边....

n.喷火山口...

caldera的音标：caldera的英式发音音标为：[kɒl'deərə]caldera的美式发音音标为：[kɒl'dɪərə]...