In the past thirty years or so, scientists have been able to "see" farther and farther into sky.

在过去三十年左右的时间里，科学家已可以观测到越来越远的太空。

youdao

In the past thirty years or so, scientists have been able to "see" farther and farther into sky.

在过去三十年左右的时间里，科学家已可以观测到越来越远的太空。

youdao