It would be beneficial for you to go outside every once in a while.
偶尔出去走走对你有好处。

I think a joint venture would be beneficial to us both.

我认为合资经营对双方都是有利的。

Some of this filtering is beneficial

这种过滤有些是有益的。

※A state which dwarfs its men ,in order that they may be more docile instruments in its hands even for beneficial purposes will find that with small men no great thing can really be accomplished.——John Stuart Mill, British economist  一个政府压制它的人民，以使他们成为自己手中的驯服工具——即便是为了正当的目的——它也会发现，靠受压制的人是不可能真正成就什么大事的。英国经济学家 穆勒J.S.  
※Happiness is beneficial for the body , but it is grief that develops the powers of the mind.——Marcel Proust, French writer愉快有益于人的身体，但只有悲伤才能培养心灵力量。法国作家  普鲁斯  M