This is called active SETI, or METI, where the "m" stands for messaging.

这叫做积极的搜寻地外文明计划，或可以称作向地外文明发送信息。

youdao

This is called active SETI, or METI, where the "m" stands for messaging.

这叫做积极的搜寻地外文明计划，或可以称作向地外文明发送信息。

youdao