当距离锥顶还有三米时，观察员通过无线电告诉他岩浆的活动水平，在哪里爆发，什么时候溢出。
When he was ten feet from the top, spotters described to him over the radio the level of the lava, where it was exploding, where it was spilling over.
火山口中间是火山灰锥，投下了三角形的暗影。
An ash cone rises from the center of the crater, casting a dark triangular shadow.
本文以现场实际经验为基础，重点介绍了轴承座、锥套和衬套这三个油膜轴承中关键件的清洗和检修技术。
Based on worksite practice, the paper introduces Cleaning and Overhaul Technology of the chock, bushing, sleeve which are the key parts in the oil film bearing.
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