名詞 ejector:

1. a person who ousts or supplants someone else
   同義詞：ouster
2. a mechanism in a firearm that ejects the empty shell case after firing
   同義詞：cartridge ejector

e.jec.tor

n.（名詞）
One that ejects, especially a device in a gun that ejects the empty shell after each firing.
退殼器：發(fā)射的器具，尤指槍里的裝置，在每次開火后排出空彈殼
A device using a jet of water, air, or steam to withdraw a fluid or gas from a space.
噴射器：利用水、空氣或蒸汽的噴射流的裝置，用于將液體或氣體從一個空間排擠出去