informed

Informed sources told us of the new policy.消息灵通人士告诉了我们这项新政策。

fully informed citizens/consumers/voters完全知情的市民/顾客/选民

Please keep me informed on any changes. [=please tell me about any changes when they happen]若有任何变化请通知我。

We need to spend more time researching our options so that we can make an informed choice/decision.我们需要花更多的时间调研可选项目，以便能够做出有依据的选择/决定。