这种海绵状组织是形成蛋壳的钙质来源。
This spongy tissue serves as a source of calcium for eggshell formation.
结果是有效地形成了一个液体海绵，而且该混合物能够像普通柴油那样永久储存，没有重新分离的危险。
The result is, in effect, a liquid sponge, and means the mixture can be stored indefinitely, like ordinary diesel, without risk of separation.
按照传统的见解，包括海绵、水母和珊瑚在内的简单动物按部就班发生演变，以线性方式形成像哺乳动物一样的更加复杂的生物体。
According to conventional thinking, simple animals, including sponges, jellyfish and corals, evolved step-by-step in a linear fashion into those with more complex bodies, such as mammals.
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