headway level 2-unit 10- part 1

What does it mean by "all-time great "?

俄罗斯方块

The game spread to Moscow?

What does it mean by "spread"?

人工智能研究员

Yin and Thomas work together in the same company.

They are _. ( people who work in the same company, a noun start with "c" )

软件

出版商

出口

进口

保持 v.

残骸，遗骸 n.