to get rid of something or someone that is not wanted or needed

The station has jettisoned educational broadcasts. 电台已取消了教育广播。

to decide not to use an idea or plan

We've had to jettison our trip because of David's accident. 因为戴维发生了意外事故我们不得不放弃度假计划。

to throw goods, fuel, or equipment from a ship or aircraft to make it lighter

The captain was forced to jettison the cargo and make an emergency landing. 机长被迫投弃机上的货物并紧急迫降。