爬行动物的骨骼生长在本质上是周期性的，在骨头上产生一系列的同心圆，就像树木的年轮一样。

Bone growth in reptiles is periodic in nature, producing a series of concentric rings in the bone, not unlike the growth rings of a tree.

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在地球上，人们认为，表明太阳黑子周期最可靠的迹象之一是树木的生长速度，就像树干横截面上可见的年轮一样。

On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow, as seen in the rings visible in the cross sections of their trunks.

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“它们就像管弦乐队一样连在一起，” 因此，当其中一个周期不正常，往往也会冲击另一个周期。

"They're all linked together like an orchestra, " so when one cycle is out of whack, it tends to sideswipe the others as well.

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That is three, Periodic Table, Table of Constants, aid sheet.

有三样，元素周期表，常数表，帮助表。

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