The country has not forsworn the use of chemical weapons.

该国并未保证禁用化学武器。

And purest faith unhappily forsworn.

纯洁的信仰被不幸地抛弃。

We have never forsworn the use of force.

我们从来没有承诺过放弃使用武力。

Some American retailers have forsworn fuel from the tar sands.

一些美国零售商发誓不购入产自油砂的燃料。