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[2015年上半年VOA常速英语] VOA常速英语(翻译+字幕+讲解):无人机帮助科学家们研究澳大利亚濒危的考拉
而使用安装红外摄像机的无人机对考拉进行普查也是开创了先河。昆士兰理工学院技术员加文·布罗德本特表示对于这种想法,他们一开始是存在疑虑的。2015-03-18 编辑:mike
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2015-03-18 编辑:mike