This is the 4697th most frequent Chinese word.
發射
"發射" means "to launch" or "to emit."
In this sentence, "發射" is used in the context of launching an object, specifically a satellite, into space.
衛星已成功發射。
The satellite has been successfully launched.
Here, "發射" refers to the planned event of launching a rocket into the atmosphere.
火箭將於明天發射。
The rocket will be launched tomorrow.
In this usage, "發射" describes the action of emitting rays or beams from a device.