在家庭环境中，人们往往放松警戒而导致丑陋的对峙。
A family setting is when people often let their guard down, which can lead to ugly confrontations.
同样， 温斯坦认为，依赖累计里程会员卡来确保航空保全，可能导致在最需要提高警觉时，反而放松了警戒。
Similarly, weinstein argues, relying on a " frequent traveler card " for airline security could lead to relaxed vigilance just when it ' s most needed.
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