be beneficial to是什么意思？

be beneficial to 直译成：对...是有益的，或对...是有利的；
be benefit to 直译成： 对...是一种好处，或一种优势。

benefit

1、用作名词。意思是：利益；好处
It is said Yogo is of great benefit to human health.
据说瑜咖功对人体健康有极大好处。
I did it for his benefit. 
我做这个是为了帮助他。
2、用作动词。（常与from, by连用）获益；得益于
The plants benefited from the rain. 
植物得益于这场雨。
We benefit from daily exercises.
我们得益于每天做操。
固定搭配：
for the benefit of为了的好处

beneficial

adj.有益的；有利的；有帮助的

Many beneficial properties are attributed to them.

它们具有许多对人体有益的性质。