严阵以待的 meaning in Chinese

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Ranks of police faced crowds hurling insults , spitting , sometimes throwing acid
一排排严阵以待的警员遭群众辱骂、吐唾沫，甚至掷硫酸。
Evidence that the embattled us consumer is starting to pull back on spending mounted yesterday after new data revealed that retail sales fell last month
昨日新的数据显示上月零售额下滑之后,严阵以待的美国消费者已经开始紧缩消费开支的证据进一步增强