[译] 熔岩是火山喷发造成的。
[误] The melted rock was caused by the eruption of a volcano.

[正] The melten rock was caused by the eruption of a volcano.
[注] 动词 melt(熔解,溶化)有两个过去分词：melten 与 melted；melten 指高温熔解的，如：Metal has been melten at a high temperature. 金属在高温下熔解了。如果说某物在低温下溶化时用 melted，如：The ice has melted. 冰化了。