The result is a naturally sealed system.

结果是一个自然密封的系统。

Although sauropods were undoubtedly bigger, they did not produce the largest eggs that we currently know of Although many types of eggs have hard shells they are not a sealed system.

尽管蜥脚类动物无疑更大，但它们并没有产生我们目前所知的最大的蛋。尽管许多类型的蛋都有硬壳，但它们并不是一个密封的系统。