...丁网 向前移动的凝视时间 （FFD，forward fixation duration），以及往回移动后 的凝视时间（BFD，backward fixation duration）。在 蔡介立的实验中仅计算FFD的时间，所以本实验亦 只计算FFD的时间。
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眼见为实：当我们利用望远镜凝视着宇宙，事实上我们正在回望过去的时间。
SEEING IS BELIEVING: When we peer into space with a telescope, we are actually looking back in time.
临别前，他再次望了望帕蒂，长时间凝视着自己的孩子……最后转向他生命的伴侣劳伦，倚靠在他们肩头，静静的走了……
Before embarking, he’d looked at his sister Patty, then for a long time at his children, then at his life’s partner, Laurene, and then over their shoulders past them.
在那里，我可以和星星彼此凝视，而且可以第一时间去迎接曙光的到来。
There the stars and I could gaze at each other, and no time was lost in greeting the dawn.
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