At first they were unable to move their hind legs at all, but by the end of the study they could support their weight and walk almost perfectly.
起初，它们根本无法移动后腿，但在研究结束时，这些老鼠可以承担全身的重量，而且可以近乎完美地步行。
2
Then he realized that it was a Wolf - a Wolf standing on its hind legs, with its front PAWS against the tree-trunk, snapping and snarling. All the hair on its back stood up on end.
后来他才想到这是一匹狼——一匹狼后腿站着，前爪扑在树干上又咬又吼，背上的毛根根竖起。
3
Right now, Oscar has round pegs at the end of his hind legs.