The term actinomorphy is generally used to describe radial symmetry in flowers.
常“对”描状的花。
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Or a 5-limbed animal like a starfish—radial symmetry removes many of the limitations that would prevent odd numbers of limbs.
或者那样的五肢物——辐射对称消除了许多阻碍奇数肢的限制。
But why five-part radial symmetry, specifically?
但为什么是五辐辐射对称呢？
So how did the ancient ancestors of starfish go from having bilateral symmetry to having radial symmetry?
那么，的远古祖先是如何从具有双侧对称性演变成具有辐射对称性的呢？
Except Ctenoimbricata didn't have radial symmetry.
除了梳状板物没有辐射对称。
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划词翻译
详细解释
“
对
”描
状的花。
-
物趣闻 
那样的五肢
的限制。
