Intelligence to prevent attacks is part of what experts call a "layered" security approach.

防止袭击的情报是专家所说的“分层”保安措施的一部分。

youdao

Intelligence to prevent attacks is part of what experts call a "layered" security approach.

防止袭击的情报是专家所说的“分层”保安措施的一部分。

youdao