Without that, the D. O. C. has no obligation.

没有这个的话，监狱总局没有义务。

Think of how 'association' is spelled. There's an S-O-C in there, association, and people shortened that word into soccer. So instead of saying association you'd just say soccer.

想一想“association” 是如何拼写的。 那里有一个 S-O-C，协会，人们将该词缩写为足球。 所以与其说协会， 不如说足球。

In the 1880s, Yale paleontologist O. C. Marsh found that some specimens of Stegosaurus had a big cavity in it sacrum, where the spinal column meets the pelvis.

在 1880 年代， 耶鲁古生物学家 O. C. Marsh 发现剑龙的一些标本在其骶骨处有一个大空腔，也就是脊柱与骨盆的交汇处。

Then, in the 1870s, American paleontologist O. C. Marsh described two more species that illuminated the transition between dinosaurs and birds, found in late Cretaceous rocks from Kansas.

然后，在 1870 年代， 美国古生物学家 O. C. Marsh 描述了另外两个物种， 它们阐明了恐龙和鸟类之间的过渡，它们是在堪萨斯州的白垩纪晚期岩石中发现的。