本期内容：

SpaceX, an American space startup, launched 11 communications satellites into orbit before returning the first stage of its Falcon 9 rocket to Cape Canaveral in Florida, where it made a powered landing. Reusing the first stage, which accounts for 70% of the rocket’s $54m cost, would make access to space much cheaper.

词义解析:

Startup：创业公司

communications satellites：通讯卫星

orbit：轨道

account for：占……