discharge 语气较重，指有理由的解雇，含几乎不再复用的意味。
dismiss 正式用词，是这组词中语气最轻的一个词，一般只有从上文才能看解雇的原因或理由。
fire 口语用词，多指被断然地突然解雇，其行动犹如开枪一样干净利落。
参考例句
1. The dockers discharged a ship. 码头工人卸下了船上的货物。
2. Thus, the discharge lamp starts with certainty. 如此，可以确定地启动放电灯。
3. Factory chimneys discharge smoke into the atmosphere make it dirty. 工厂的烟囱往空气里排烟，造成大气污染。
英英解释
n.
1. the sudden giving off of energy
2. the act of venting
3. a substance that is emitted or released
4. any of several bodily processes by which substances go out of the body
5. electrical conduction through a gas in an applied electric field
6. the pouring forth of a fluid
7. the termination of someone's employment (leaving them free to depart)
8. a formal written statement of relinquishment
9. the act of discharging a gun v.
1. complete or carry out
2. pour forth or release
3. eliminate (substances) from the body
4. free from obligations or duties
5. remove the charge from
6. go off or discharge
7. pronounce not guilty of criminal charges
8. leave or unload, especially of passengers or cargo
9. cause to go off
10. release from military service
11. become empty or void of its content
