这是1893年的一张照片，奥特·李林塔尔乘着他的载人飞行器翱翔在人群上空。
Otto Lilienthal soars above a crowd in one of his manned gliders in an 1893 photograph.
这是美国摄影家沃克·埃文斯拍摄的一张照片，你们可以看出，是拍的布鲁克林大桥。
This is a photo by another American photographer, Walker Evans, a photo of Brooklyn Bridge. You recognize it.
他并且背着弗兰克林，把她拍摄的关键照片提供给沃森，这张照片表明——第一次表明——构成DNA结构的是双螺旋状态。
He'd also provided Watson, without Franklin's knowledge, with her key photograph, which showed — for the first time — the double-helix shape that underlies the structure of DNA.
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