NASA, space companies, schools are all customers.

美国航空航天局、太空公司、学校都是它的顾客。

It's a noun, and it means the activities or group of people that relate to running a company, school, or other organization.

这是一个名词，它的意思是与管理公司、学校或其他组织有关的活动或一群人。

So unless everyone -- governments, companies, schools, scientists and citizens -- make a united commitment to reversing the damage that we've caused, it will be too late.

AV：因此，除非每个人——政府、公司、学校、科学家和公民——共同承诺扭转我们造成的损害，否则为时已​​晚。