maintain和retain 有什么区别

maintain
[men5tein]
vt.
维持, 维修, 继续, 供养, 主张

maintain
main.tain
AHD:[m³n-t³n“]
D.J.[mein6tein]
K.K.[men6ten]
v.tr.（及物动词）
main.tained， main.tain.ing， main.tains
To keep up or carry on; continue:
维持或保持；继续：
maintain good relations.
维持良好的关系
To keep in an existing state; preserve or retain:
保持存在的状态；坚持或保持：
maintain one's composure.
保持冷静
To keep in a condition of good repair or efficiency:
保养：使…保持在良好的修缮和效率状态中：
maintain two cars.
保养两辆小汽车
To provide for; support:
扶养；支持：
maintain a family.
供养家庭
To keep in existence; sustain:
使存在；支撑：
enough food to maintain life.
足够维持生命的食物
To defend or hold against criticism or attack:
保卫或抵制批评或进攻：
maintained his stand on taxes.
维护他在税收上的立场
To declare to be true; affirm:
断言；主张：
maintained her innocence.
坚持她的清白无辜

retain
[ri5tein]
vt.