If eugenol containing temporary cements were used, use pumice to thoroughly remove all traces of cement.如果使用的是含丁香酚的暂时性粘结材料，用浮石粉彻底的清除所有的粘结材料。
Mounds of pumice and volcanic ash mark its center, where the volcano remains.浮石和火山灰的土墩标志着它的中心，是火山的遗迹。