Warnings of an enemy attack forced the troops onto the defensive.
敌军显示出进攻
迹象，部队不得不进入戒备状
。
Warnings of an enemy attack forced the troops onto the defensive.
敌军显示出进攻迹象，部队不得不进入戒备状。
The dog jealously guarded its bone.
那狗戒备地看管着它
。
The patrol police on duty are on the alert against any possible disturbances.
"值班巡警处于戒备状,随时准备应付任何可
骚乱。"
声明：以上例句、词性分类均由互联网资源自动
成，部分未经过人工审核，其表达内容亦不代表本软件
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