对一个有机体特定主体设计的维持是相对恒定的。
Maintenance for a given body design of an organism is relatively constant.
其温度相对恒定，储量巨大，是不应被忽视的新能源。
The temperature is relatively constant, huge reserves, should not be overlooked is new energy.
各组筛窦在发生时间上不同步，但其位置则相对恒定。
The ethmoid sinus presented at birth and its appreance were not synchronous, but their location were relatively invariable.
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