您要查找的是不是：
- The boxer led with the chin when he dropped his guard as he moved forward. 这个拳击手向前进攻时，失去警惕，露弱弱点而遭到对方攻击。
- He hit him when his guard was down. 他乘其不备击中了他。
- Seeing the opponent was off his guard, the boxer landed a knockout punch. 乘对手不提防,那拳击手一下子把他击倒了。
- The lawyer's seemingly innocent question caught the witness off his guard. 那个律师提出的似乎无关痛痒的问题，把证人问得措手不及。
- Mark is constantly on his guard. 马克始终很警惕。
- He had to lower his head to get through the door. 他得低头才能过这道门。
- Arwen：What's this? A Ranger caught off his guard? 亚玟：怎么了，游侠竟然毫无防备？
- He had to lower his voice to control his feeling. 他不得不压低声音来控制自己的感情。
- His guard is very positive towards his work. 他的护从对工作很上心。
- "He was chatty, " his guard said. |"他还在饶舌; " 看护他的警卫后来说.
- The prisoner broke away from his guards. 囚犯从看守者手中逃脱了。
- The inmate outwitted his guards and escaped. 囚犯骗过警卫逃跑了。
- The doctor gave him some medicine to lower his blood pressure. 医生给了他一些药来降低血压。
- Cao Cao from then onwards, let down his guard on Liu Bei. 曹操见状，大笑不止，认为刘备连打雷都害怕，成不了大事，对刘备放松了警觉。
- Dashu knows to lower his head when he wants to get under his bed. 大树爬进小床的时候会把头低下，匍匐前进。
- He's always on his guard against saying the wrong thing. 他总是谨防说错话。
- lower his guardvi. 丧失警惕
- My words put Jack on his guard against speaking too freely over the telephone. 我讲的是要杰克在电话里说话不要太随便了。
- Did you notice how low his B.P.Was at the end, even with three pressors? |你有没有注意到最后就算用了三只升高血压的针 婴儿的血压还是降到很低?
- He was on his guard, fearful of any pursuit by the gang boss or his men. 他很警惕，害怕被帮派老板和其同僚追杀。
