This is important because this molecule here, deoxyribose, is not the same upside down as it is - it's not symmetrical upside down and right side up, it's different because the 5' carbon's either pointed up or pointed down.

这很重要,因为对脱氧核糖来说,不都是像这样自上而下的,不是对称的自上向下或全部向上的,长链不同是由于,5'碳向上或者向下的指向不同

耶鲁公开课 - 生物医学工程探索课程节选

There's a little video player on the right side of The screen that allows the student or the professor Teaching from these materials to bring up those Materials and show the students. So this allow The students to explore materials on their own.

屏幕右边有个小放映机,能让学生和用这些资料教学的教授,提取出这些媒体资料,并播放给学生看,这允许学生自己发掘资料。

麻省理工公开课 - 媒体、教育、市场课程节选