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- Be on guard when somebody flatters you. 有人奉承你時,一定要當心。
- While danger threatens we must all be on guard. 危險正逼近,我們必須保持警惕。
- A sentry stood on guard at the corner. 一個哨兵在角落裡站崗。
- There are soldiers on guard at the gate. 大門口有士兵在守衛。
- Be on guard against those who are jealous of your success. 要提防那些嫉妒你的成功的人。
- We must be on guard against hidden enemies. 我們必須警惕暗藏的敵人。
- We thought it best to be on guard. 我們覺得最好還是保持警錫。
- He told us again and again to be on guard. 他一再要我們提防。
- The citizens were warned to be on guard against a sudden night attack. 市民們得到通知,要提防夜間的突然襲擊。
- We should be on guard against the enemy's invasion. 我們要防範敵人的入侵。
- The police are on guard at that building. 警察守衛著那棟大樓。
- We should be on guard against such people. 我們應警惕這種人。
- You should be on guard against pickpockets. 你要謹防扒手。
- The man below there are always on guard. 下面的人又總是片刻不離地守著。
- Put none but Americans on guard tonight. 今夜只讓美國人擔任警戒。
- They should be certainly on guard . 他們早該防範一些的。
- Two soldiers must be on guard all night. 必須有兩個士兵撤夜站崗。
- They startle easily and are often on guard. 處於防禦狀態。
- Henry places himself on guard in the manner of well taught boxer. 亨利像一個經過名師傳授的拳擊家那樣擺好防禦的架勢。
- Tom saw a young man with a rifle on guard at the entrance. 湯姆看到一位持槍的年青人在門口站崗。