但是经过上述实验后，两个钟表的时间差距不到十亿分之一秒，所以需要用两个非常精准的钟表。
However, after the experiment described above the difference in time between the two clocks was less than a billionth of a second, which is why very accurate clocks were needed.
经过多次远距离的飞行之后再比较两个钟表，结果发现喷气式飞机上的钟表比地面上的钟表跑得慢。
After a number of long distance flights the two clocks were compared and the one that had been on the plane was running behind the clock that had stayed on the ground.
此外，她把卧室布置得和原始岩洞没两样，拿走了所有钟表（她说，由两个小儿子来充当她的闹钟），还装上了遮光窗板。
Next, she turned her bedroom intothe equivalent of a Lascaux cave, removing all clocks (her two young sons serve as hermorning alarm, she said) and installing blackout window inserts.
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