a. 〔行动或决定〕一方的，单边的，单方面的
unilaterally ad. 单方面地
a unilateral decision 单方面的决定
That way, Apple could not unilaterally introduce a code that weakens the iPhone – a user would have to consent to it. 不能单方面引入代码，用户必须同意。
BrE /əˌbriːviˈeɪʃn/