1The group was considered to be a risk to national security.

　　這伙人被認為是威脅國家安全的危險分子。

　　2Financial security was high on his list of priorities.

　　在他的心目中，金融安全是十分重要的一環。

　　3You may not enter the security area without authorization.

　　未經批準不得進入警戒地區。

　　4Let's look at the question of security.

　　咱們來看一下保安問題。

　　5The President doesn't need a primer on national security.

　　總統對于國家安全是不需要讀入門書的。