There were several attempts and failures with Lunnik [a series of unmanned Soviet moon probes].

在Lunnik(苏联的一系列无人月球探测器)计划中有过数次尝试和失败。

youdao

There were several attempts and failures with Lunnik [a series of unmanned Soviet moon probes].

在Lunnik(苏联的一系列无人月球探测器)计划中有过数次尝试和失败。

youdao