In recent years, we have witnessed many social changes.

最近几年，我们见证了许多社会变革。

I have witnessed this reality.

我见证过这个事实。

I have witnessed firsthand the power of ideas.

我亲眼目睹了思想的威力。

I have witnessed other instances of like behavior.

我曾见证过其他类似的行为。

I have witnessed the tremendous energy of the masses.

我看到了广大群众的惊人力量。

Recent years have witnessed the collapse of the steel industry.

近年来钢铁业日渐衰落。

These regions have witnessed continued economic and social development.

民族地区的经济社会获得不断的发展。

They, like me, have witnessed more than their share of violence.

他们和我一样，也目睹了本不该由他们承受的暴力。

All Americans have witnessed this idealism, and some for the first time.

所有美国人都目睹了这种理想主义，有些人是第一次看到。

Since the company officially formed, we have witnessed the growth of peonies .

自公司正式组建以来，我们共同见证了牡丹的成长。