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- On August 2, 1995, Mundungus Fletcher was on guard duty, tailing Harry Potter around the neighborhood of Privet Drive. 1995年8月2日是轮到蒙顿格斯·弗莱奇执勤，暗中跟踪保护在女贞路附近活动的哈利。
- Be on guard when somebody flatters you. 有人奉承你时，一定要当心。
- While danger threatens we must all be on guard. 危险正逼近，我们必须保持警惕。
- We must be on guard against hidden enemies. 我们必须警惕暗藏的敌人。
- We thought it best to be on guard. 我们觉得最好还是保持警锡。
- He told us again and again to be on guard. 他一再要我们提防。
- We should be on guard against the enemy's invasion. 我们要防范敌人的入侵。
- We should be on guard against such people. 我们应警惕这种人。
- You should be on guard against pickpockets. 你要谨防扒手。
- Be on guard against those who are jealous of your success. 要提防那些嫉妒你的成功的人。
- Two soldiers must be on guard all night. 必须有两个士兵撤夜站岗。
- I was back on guard duty early the next morning, sitting on a stool at the foot of Eichmann's bed. 第二天早上值班，我就坐在他床尾的凳子上。
- Cowboys should be on guard against the attacks from wild animals. 牛仔必须提防着野兽的袭击。
- We must be on guard not to let the enemy spies worm in . 我们必须警惕，不让敌特钻进来。
- The citizens were warned to be on guard against a sudden night attack. 市民们得到通知，要提防夜间的突然袭击。
- We must be on guard not to let the enemy spies worm in. 我们必须警惕,不让敌特钻进来。
- He makes seven rounds each time and walks the same path on every round. You people on guard duty know that. 他绕七圈,每一圈都绕一样的路径,你们站卫兵的人都知道。
- When we go shopping,we should be on guard against pickpockets. 当购物的时候，我们应该提防扒手。
- We should be on guard against the enemy rs invasion. 我们要防范敌人的入侵。
- The soldier volunteered for guard duty. 那个战士自告奋勇去站岗。
