existence

Surely my existence cannot be so purposeless?

想必，我的存在不可能如此毫无意义吧？

A search is now under way to confirm the suspected existence of particles of matter that move at a speed greater than light.

目前正在进行一项研究，以验证一些被怀疑真实性的物质粒子究竟是否存在。这些物质粒子的移动速度大于光速。

Because if we aren't, we won't be providing much value in future ecosystems, and that may put in question the foundation for our existence.

因为如果我们不是（最具有创造力的生物），我们将无法在未来的生态系统中提供多少价值，这可能会使我们存在的基础受到质疑。

I lead a pretty mundane existence.

我过着相当平淡的生活。

Of course, the colored world was not so much a neighborhood as a condition of existence.

当然，有色人种的世界与其说是一个社区，不如说是一种生存条件。

Earth scientists are in the midst of a revolution in understanding how climate has changed in the past and how those changes have transformed human existence.

地球科学家正在进行一场革命，以了解气候在过去是如何变化的，以及这些变化如何改变了人类的生存方式。