花岗岩中的球状构造；
当氧耗尽时，在方铁矿中遗留下氧耗尽的空洞，形成眼球状构造。
When the oxygen was consumed up by the wustite, some holes remained and showed eyeball structures.
人们把地球的构造假设为球状对称。
A spherically symmetric structure of the earth has been assumed.
人们把地球的构造假设为球状对称。
A spherically symmetric structure of the earth has been assumed.
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