科学家们发布了一副最为精确的地球重力地图。

Scientists have unveiled the most accurate map ever produced of the Earth's gravity.

youdao

尽管还未有人这样做过，不过请想象一下，如果把Twitter的使用者 -- 截止上个月已经超过三亿注册用户 -- 加上去，这幅地图又将会呈现一副怎样的景象。

No one has done this, but just think what that map would look like if you were to add Twitter users, whose numbers last month surpassed 300 million.

youdao

这项工作建立在一副2003年的地图上，并发表于astronomy and Astrophysics。

The work builds on a 2003 map and was published in the journal Astronomy and Astrophysics.

youdao

You can't see this too well but there's a map of the world here that actually shows you all the individual cases of polio that occurred between this period of August 2007 and, it's cut off on the screen, February of 2008.

你可能看不清这个幻灯片,但是这里有一副世界地图,上面准确的展现了在二零零七年八月到,在屏幕上没有显示出来,是到二零零八年二月之间发生的,所有小儿麻痹症的个案

耶鲁公开课 - 生物医学工程探索课程节选