constant alert meaning in English

经常戒备

In a bullying situation the level of fear is so high that one is on constant alert for danger
在一个欺负情境下，惧怕的水平太高，以至于人们会时刻保持留心警觉危险的状态。
So the man had to be on constant alert . even when he was cooking or cleaning the toilet , he had to be on the lookout
所以，那个徒弟就必须随时都要有防备的心，煮饭的时候也保持高度警戒，连洗厕所的时候也会不时地东看看西看看。
The master used an uncommon method . he often attacked the disciple when the disciple was not prepared , like when he was cooking , bathing or sleeping at night . so the disciple had to be on constant alert , and later he became a very good and famous kendo master
那位师父用非正式的方式，拿着木剑出其不意地攻击那位徒弟，当徒弟在煮饭洗澡的时候，或是三更半夜在睡觉的时候，也在一旁攻击他，所以那位徒弟必须随时都保持防备心，后来就成为一位很厉害的剑师，很出名很出名！