a pleasant feeling that you get when you receive something you wanted, or when you have done something you wanted to do

She looked at the finished painting with satisfaction. 她满意地看着完成的画作。

She derived/obtained great satisfaction from/out of helping other people. 她帮助别人，由此获得了巨大的满足。

For me, job satisfaction is more important than the money. 对我来说，从工作中得到的满足比钱更重要。

She had the satisfaction of knowing that she'd done everything she could. 知道自己已经尽力了，她就没什么遗憾了。

a way of dealing with a complaint or problem that makes the person who complained feel happy

You've sold me a defective product and I demand satisfaction (= you must return my money or give me a new product). 你卖给我的是劣质产品，我要求得到赔偿。

the act of fulfilling (= achieving) a need or wish

the satisfaction of one's sexual desires 性欲的满足

in a way that a particular person can believe or accept

The boy explained to the satisfaction of the court why he had lied. 法庭听信了男孩对撒谎原因的解释。