My position in this home had become untenable.

我在这个家的地位已经难以维持了。

Your excuse is simply untenable. You'd better tell the truth.

你的借口根本站不住脚，你还是说实话吧。

The Prime Minister's position immediately became untenable.

总理的地位很快就变得岌岌可危。（来自《BBC听力2014年2月合集》）

This argument is untenable from an intellectual, moral and practical standpoint.

从知识 道德和现实的角度来看 这种论点是站不住脚的

This argument is untenable from an intellectual, moral and practical standpoint.

从知识、道德和现实的角度来看，这种论点是站不住脚的。

His position had become untenable and he was forced to resign.

他的地位已难以维持，因此他被迫辞职。

She was so disloyal to her deputy she made his position untenable.

她对她的副手如此不忠诚，以至于弄得他的职位岌岌可危。

But now, this theory is untenable.

但现在，这种理论站不住脚了。

In the long term, this is untenable.

长期来看，这是无法维持的。