作证的证人以及与其联系在一起的被证实、确认并以证据的形式出示的文件和其它东西是获取证据的源泉。
The evidence it receives from the witnesses who testify, together with the documents and other things which are identified, authenticated and introduced in evidence.
绘制1945年到1999年的分布证实了这一形式，但是为明确起见这些数据被剔除了。
Plotting the distributions for the years between 1945 and 1999 confirms this pattern but are left out of the figure for the sake of clarity.
美国宇航局天体生物学家麦克凯伊说：“如果最终被证实为生命迹象，这将是双重惊喜。因为它不仅证明了外太空有生命存在，同时还意味着与地球生命迥然不同的、并非以水为生的第二种生命形式也存在。”
NASA astrobiologist Chris McKay said: 'If these signs do turn out to be a sign of life, it would be doubly exciting because it would represent a second form of life independent from water.
美国宇航局天体生物学家麦克凯伊说：“如果最终被证实为生命迹象，这将是双重惊喜。因为它不仅证明了外太空有生命存在，同时还意味着与地球生命迥然不同的、并非以水为生的第二种生命形式也存在。”
NASA astrobiologist Chris McKay said: 'If these signs do turn out to be a sign of life, it would be doubly exciting because it would represent a second form of life independent from water.
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