The British occupation of Afghanistan, in place since 1839, was no longer tenable.

自1839年，英国领阿富；而此时，英国已无法继续维持对阿富领。

Officials say the mission is no longer tenable. Austria provides nearly 400 soldiers about a third of the UN peacekeeping mission.

官方称任务已不再合理，奥地利近400名士兵，约联合国维和使团近三分之一。

There has been some progress on the Senate side, with Republicans recognizing it's not tenable, it's not smart, it's not good for the American people to let America default.

目前参议院已经取得一些进展，共和党承认进展并非无懈可击，并不明智，对美国人来说，让美国违约是糟糕。