“威胁的”用英语怎么说

到目前为止，反叛分子面对威胁的反应非常谨慎。Rebel sources have so far reacted cautiously to the threat.书架上摆满了有关环境威胁的书，不堪重负。Bookshelves groan under the burden of books on threats to the environment.威胁的迫切性the immediacy of threat...