以下是惠勒在他的书《时间的边界》（Frontier of Time）中 的一段话： 因此并不受方程式的限制，却制造出不易改变的假相。 这种对自然的看法，似乎太过诗意而不像科学。
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还有没有时间的边界和疆域的空间之美。
And there is the beauty of space that is without the boundary of time and line.
这些地幔柱显然起源于很深的地方，可能深至地核和地幔之间的边界，而且许多都已经活跃了很长时间。
The plumes apparently originate at great depths, perhaps as deep as the boundary between the core and the mantle, and many have been active for a very long time.
在几个世纪的时间里，拉皮塔人扩展了他们的边界，从巴布亚新几内亚的丛林覆盖的火山延伸到汤加最孤独的珊瑚离群。
Within the span of several centuries, the Lapita stretched the boundaries of their world from the jungle — clad volcanoes of Papua New Guinea to the loneliest coral outliers of Tonga.
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