Some physicists said earlier on Tuesday they believed the trail had been left by an aircraft, and that on a clear day vapour can appear to rise vertically as the result of an optical illusion.
星期二早些时候，一些物理学家说，他们相信那道轨迹是飞行器留下的，而且，在天气晴朗时，由于人的错觉，蒸汽会显得像是垂直上升的。
Just three days earlier buoy showed a rapid rise in the sea floor on this little platelet but now the depth is plunging! What's going on here?
三天前浮标表明了这个小小板块海拔的突然变化，但是为什么这里出现突然的加深？
Just three days earlier buoy showed a rapid rise in the sea floor on this little platelet but now the depth is plunging! What's going on here?
三天前浮标表明了这个小小板块海拔的突然变化，但是为什么这里出现突然的加深？
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