This argument just does not hold water.

这种论点完全站不住脚。

I don’t think the argument will hold.

我认为该论点站不住脚。

His argument is untenable. / His argument does not hold water.

他提出的理由是站不住脚的。

But, the argument fails to account for the equal amount of love that children adopted later in life hold for their adoptive parents.

然而，这一论点没办法解释当小孩被养父母收养时，他们在往后的生活中对养父母也产生同样那么多的爱。

But the argument that Japan needs to intervene in the currency markets because the yen is too strong doesn't hold water.

但是辩称日本需要在货币市场进行干预是因为日元太强并不成立。