托马斯和他的朋友们 第五季 第12集 双重牙齿有问题 是在优酷播出的少儿高清视频,于2011-10-10 11:12:59上线。视频内容简介:12 Double Teething Troubles
Teething troubles at huge telescope A valve got stuck open on a line that feeds coolant to a secondary mirror at the Large Binocular Telescope (LBT), a double-barrelled behemoth with two 8.4-metre-wide main mirrors. By the time anyone noticed, one of the ... A Witze - 《Nature》 被引...