测绘科学技术
标杆
The Twin Otter aircraft was flying from the South Pole to an Italian Antarctic base when its emergency beacon was activated at 10:00 GMT on Wednesday.
BBC: Antarctic search for missing plane carrying Canadians
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。