词汇	lava cavern
释义	lava cavern 熔岩洞穴；熔岩洞
随便看	the principle of tax the principle of taxation legitimacy the principle of tax equity the principle of tax law the principle of the law the principle of the proportionality the principle of thermomechanics the principle of the sextant the principle of the supremacy of the law the principle of thinking-economy the principle of three parts the principle of tolal involvement the principle of trial the principle of trust the principle of trust-protection the principle of truth the principle of universal morality the principle of voluntariness the principle of whips the principle of wide consultation the principle of wooden cask the principle of work the principle of working the principle of zero-crossing the principle part