a.

1. 有益的；有利的；有幫助的[（+for/to）]
   It would be beneficial to keep abreast of developments in Asia.

   跟上亞洲形勢的發展會有助益。

2. 【律】有權益的；受益的
   beneficial legacy

   有權受益的遺產

adj.

1. favourable or advantageous.
2. Law  relating to rights to the use or benefit of property, other than legal title.