In its life-span, a mated pair of Sauroposeidons might produce thousands and thousands of eggs and only maybe a couple or three are going to survive to adulthood.

一对波塞东龙一生能产下成千上万的蛋，可是只有为数不多的两三只能活到成年。

They live in flocks of 30 or more,   and mating pairs arrange their nests close to other couples in the same tree.

它们以 30 只或更多为一组生活，交配的一对将它们的巢穴安排在同一棵树上的其他夫妇附近。

Declaring that both of the gifted pandas were male, the Soviets asked China to replace one of them with a female panda, in the hope that the pair would mate and produce offspring.

苏联称这两只赠送的熊猫都是雄性，要求中国用一只雌性熊猫取代其中一只，希望这对熊猫能交配并生育后代。