我注视著父母和祖父母的相片,努力想像他们的父母是什么样子,就这样一直想下去回溯数代,追溯久远。
I looked at pictures of my parents and grandparents and tried to imagine their parents, and so on, back through the generations, back and back through time.
一个新的摄谱仪回溯数十亿光年远的宇宙绘制宇宙网状结构图,并追溯宇宙中生命基本元素的分布。
A new spectrograph slices across billions of light-years to map the filamentary structure of the universe and trace the distribution of elements that are fundamental to life.
一个新的摄谱仪回溯数十亿光年远的宇宙绘制宇宙网状结构图,并追溯宇宙中生命基本元素的分布。
A new spectrograph slices across billions of light-years to map the filamentary structure of the universe and trace the distribution of elements that are fundamental to life.
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