He gave a lame excuse for being absent.

他找了个站不住脚的借口来释缺席的原因。

He tried to justify his absence with lame excuses.

他想用站不住脚的借口为自己的缺席辩。

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

得你的理论是站不住脚的, 必予以摒弃。

This disproves the theory that children are purely imitative.

这证明认为儿童只地模仿的理论是站不住脚的。

I incline to the view that this conclusion is untenable.

赞同该结论站不住脚这一观点。

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

只有最天真的人才相信这么一个站不住脚的借口!

This argument, however, does not hold water.

但是,这种观点是站不住脚的。

The argument won't wash.

那个论点站不住脚。