not have a leg to stand on

1. They cussed Jim considerble, though, and give him a cuff or two side the head once in a while, but Jim never said nothing, and he never let on to know me, and they took him to the same cabin, and put his own clothes on him, and chained him again, and not to no bed-leg this time, but to a big staple drove into the bottom log, and chained his hands, too, and both legs, and said he warn't to have nothing but bread and water to eat after this till his owner come, or he was sold at auction because he didn't come in a certain length of time, and filled up our hole, and said a couple of farmers with guns must stand watch around about the cabin every night, and a bulldog tied to the door in the daytime; and about this time they was through with the job and was tapering off with a kind of generl good-bye cussing, and then the old doctor comes and takes a look, and says
尽管如此，他们还是恶狠狠地咒骂杰姆，还时不时地给他一个巴掌。不过杰姆决不吭一声。他装做不认识我。他们把他押回原来那间小屋，把他自己的衣服套在他身上，再一次用链子把他铐了起来。这一回可不是拴在床腿上了，而是拴在墙脚那根大木头上钉着的骑马钉上，把他的双手和两条腿都用铁链拴住了。还对他说，吃的只给面包和水，此外不给别的，一直要到他的原主人来，或者在过了一定期限原主人还不来，就把他给拍卖掉。他们把我们当初挖掘的洞填好了。还说每晚上要派几个农民带上枪在小屋附近巡逻守夜。白天要在门口拴一条恶狗。正在这时，正当他们把事情安排得差不多，最后骂几句作为告别的表示时，老医生来了，四下里看了一下说

2. They cussed Jim considerble, though, and give him a cuff or two side the head once in a while, but Jim never said nothing, and he never let on to know me, and they took him to the same cabin, and put his own clothes on him, and chained him again, and not to no bed-leg this time, but to a big staple drove into the bottom log, and chained his hands, too, and both legs, and said he warn't to have nothing but bread and water to eat after this till his owner come, or he was sold at auction because he didn't come in a certain length of time, and filled up our hole, and said a couple of farmers with guns must stand watch around about the cabin every night, and a bulldog tied to the door in the daytime; and about this time they was through with the job and was tapering off with a kind of generl good-bye cussing, and then the old doctor comes and takes a look, and says: Don't be no rougher on him than you're obleeged to, because he ain't a bad nigger.
他们把我们当初挖掘的洞填好了。还说每晚上要派几个农民带上枪在小屋附近巡逻守夜。白天要在门口拴一条恶狗。正在这时，正当他们把事情安排得差不多，最后骂几句作为告别的表示时，老医生来了，四下里看了一下说：对待他嘛，别太过分了，因为他可不是一个坏黑奴。我一到那个孩子所在的地方，发现非有一个助手不可，不然，我就无法把子弹取出来。按当时的情况，我无法离开，到别处去找个帮手。病人的病情越来越糟。又过了一段时间，他神志不清了，又不允许**近他身边。要是我用粉笔给木筏子上写下记号，他就要杀死我。

3. The man with a gun and $ 300 in his pocket was accused of robbing an oil station. He did not have a leg to stand on.
这人身带一支枪，口袋里有300美元钱，被人指控抢劫加油站，他真是有口难辩。