[jǐng jiè]
（告誡人使注意改正錯誤） warn; warning admonish （也作“儆戒”、“儆械”）
[軍] （為防備敵人的偵察和突然襲擊而采取的保障措施） be on the alert against; guard against; keep a close watch on
take precautionary measures; take deterrent measures
采取警戒措施
The caution is stern.
警戒森嚴。
They were quiet during the alert.
警戒期間他們保持安靜。
The Armies were constantly on the alert not to be taken by surprise.
部隊一直處于警戒狀態(tài)以防突然襲擊。