Astronomers studying t Chamaeleontis (t Cha), a faint star 350 light-years from Earth in the southern constellation of Chamaeleon, detected a large gap in a disc of material around the star.

研究“t蜒”(T Cha)这颗在南天的蜒座中距地球350光年的黯淡恒星的天文学家们观测到在恒星周围的盘状物质中出现了一个大裂口。

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I'm going to talk for a while. (Laughter.) You guys don't sit down because you don't have chairs. (Laughter.) But you guys all have to bend your knees a little bit so you don't faint.

WHITEHOUSE: The White House

First of all, if you've got a seat feel free to take a seat, because I'm going to talk for a while. (Applause.) Point number two, if you don't have a seat, bend your knees because sometimes people faint a little bit -- all right -- and you've been standing here a while.

WHITEHOUSE: The White House