But they have theorized the signals could be produced by neutron stars.

但他们已经从理论上推测这些信号可能由中子星产生的。

Some people have even suggested that there could be multicellular life, such as fish-like creatures down there.

一些人甚至推测这些寒冷星球上还可能有多细胞生命，比如说像鱼一样的生。

Thus facts are not ideas or concepts, nor are they theories in the sense of being mere speculations about reality.

，事实不想法或，不纯粹对现实的推测意义上的理论。

Studies have theorized that water in ice form may be available in large quantities on the moon and mining could provide water and oxygen.

研究推测，月球上可能以冰的形式存在大量水，开采可以提供水和氧气。

Presumably, one of the first tasks on Mars will be to create a fuel plant that can create the fuel for the return trips of many Starships.

CA：据推测，火星上的首要任务之一就建造一个燃料厂，为许多星际飞船的回程制造燃料。

It placed the job firmly in the domain of the geographer, who could use astronomy and mathematics to calculate from the stars what the world looked like below.

该书毫不含糊地将这项工作归于地理学家范畴，为地理学家可以使用天文学和数学知识推测从星球上观测下面的地球什么样子。