Whatever stage we may regard as the beginning of the ear of interplanetary communication we shall never be able to reach its end.

无论把哪个阶段认为是星际交通时代的开始，我们都将永远达不到它的尽头。

youdao

Whatever stage we may regard as the beginning of the ear of interplanetary communication we shall never be able to reach its end.

无论把哪个阶段认为是星际交通时代的开始，我们都将永远达不到它的尽头。

youdao