The complexity of the universe is mind-boggling.

宇宙的复杂性令人难以置信。

The sheer size of the Grand Canyon is mind-boggling.

大峡谷的巨大规模令人难以置信。

The diversity of life forms on Earth is mind-boggling.

地球上生命形式的多样性令人难以置信。

The speed at which technology advances is mind-boggling.

技术进步的速度令人难以置信。

The amount of information available on the internet is mind-boggling.

互联网上可用的信息量令人难以置信。

To lead in that system requires knowledge that is fairly mind-boggling.

要在这个体系中成为领导者，需要的知识量大的令人相当难以置信。

It was totally mind-boggling stuff;

完全是些常人不可理解的东西。

The satellite images were mind boggling.

卫星图像更是让人震惊。

The financial value at stake is mind-boggling.

损失的经济价值让人难以置信。

I have all my life wondered what mind-boggling meant.

我整整一生都在想，mind-boggling（令人难以置信的）到底是指什么。