Yet even now, at opposite poles of the Earth, animals thrive in the icy wild.

然而，即使是现在，在地球的两极，动物们在冰冷的荒野中茁壮成长。

In metaphase 2, the centromeres contain two kinetochores that attach to spindle fibers from the centrosomes at opposite poles.

中期 2，着丝粒与纺锤丝连结。