士兵们正在检查他们的武器是否准备就绪。

The soldiers are checking if their ___weapons are ready for use.

在商业竞争中，专利常常被用作打击对手的武器。

In business competition, patents are often used as ___weapons against competitors.

知识是对抗无知最有力的武器。

Knowledge is the sharpest ___weapon against ignorance.