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- She is always on the alert for some new calamity. 她总是保持警觉以防某种新的灾难。
- Keep on the alert; we're due for an inspection. 提防着点，轮到检查我们了。
- They have put the army on the alert. 他们已使军队进入戒备状态。
- The alert leopard went up to a deer quietly. 警觉的豹子静悄悄地走近一只鹿。
- Many issues hung upon the outcome of the debate. 许多问题都看这次辩论结果如何来决定。
- Cross and angry words in family grate upon the ear. 不高兴与生气的话在一个家庭里令人不愉快。
- Bombs and cannonballs rained upon the town. 炸弹和炮弹雨点般地落进那个市镇。
- Troops are on the alert against any possible aggression. 军队戒备着可能的来犯。
- The castle frowned down upon the field. 城堡呈威压之势俯视原野。
- Our dog rushed upon the stranger and bit his leg. 我们的狗冲向那陌生人，咬了他的腿。
- The window looks upon the street. 这扇窗户面向大街。
- A terrible silence descended upon the whole hall. 一阵可怕的寂静突然笼罩着整个厅堂。
- He dwelt upon the memory of his mother. 他老是想着他的母亲。
- His words were lost upon the students. 他的话对于学生没有什么影响。
- Dogs are always on the alert wherever they go. 无论在什么地方，狗总是处于警觉状态。
- The trophy was bestowed upon the winner. 奖品授给了优胜者。
- They must be constantly on the alert for the enemy. 他们必须随时注意敌人。
- The sea is encroaching upon the land. 海水侵蚀了土地。
- To be careful or on the alert;take care. 戒备提防或戒备；注意
- She did not dwell upon the details of the matter. 她没有多讲事情的细节。
