1.drop one's guard 喪失警惕
Since I cannot predict in advance when the opponent will drop their guard, I don't even attempt to coordinate my breathing with the attack.
因為我不能事先預測對手何時會放松警惕,甚至我也不能使自己的呼吸與進攻相協調。
2.attempt an attack 發起攻擊
An adversary is anyone who might attempt an attack against another party.
對手是可能發起攻擊的任何人。
3.on the alert 警惕
Often on the alert, she checks once but twice in the event...
她總是警惕著,一個事情上檢查了一遍又一遍。