He gave a lame excuse for being absent.

他找了个站不住借口来解释缺席原因。

He tried to justify his absence with lame excuses.

他想用站不住借口为自己缺席辩解。

I find your theory is untenable and it must be rejected.

我觉得你理论是站不住, 弃。

This disproves the theory that children are purely imitative.

这证明认为儿童只会单纯地模仿理论是站不住。

I incline to the view that this conclusion is untenable.

我赞同该结论站不住这一观点。

Only the most ingenuous person would believe such a weak excuse!

只有最天真人才会相信这么一个站不住借口!

This argument, however, does not hold water.

但是,这种观点是站不住。

The argument won't wash.

那个论点站不住。