超高压水晶釜
发送晶体
This is a large calcite crystal recovered from a vessel that went down off the coast of Alderney, in the Channel Islands, in Elizabethan times.
ECONOMIST: How Norsemen found their way round in cloudy weather
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。