您要查找的是不是：
- He is not a wise man who cannot play the fool upon occasions. 不会在必要的情况下装傻的人，不是聪明人。
- An ubiquitous virus, encephalomyocarditis, has been demonstrated upon occasion to affect swine. 曾经证实一种到处有的病毒-脑心脊炎病毒--偶尔侵害猪。
- You can be somewhat reserved and self-centred, and show great obstinacy upon occasion. 你可能有点拘谨和自我中心的,必要时会非常顽固。
- An ubiquitous virus, encephalomyocarditis, has been demonstrated upon occasion to affect swine . 曾经证实一种到处有的病毒-脑心脊炎病毒--偶尔侵害猪。
- Nay, I can gleek upon occasion. 哈，我有时也会说说笑话。
- But particularly the third time I went, I brought away as much of the rigging as I could, as also all the small ropes and rope-twine I could get, with a piece of spare canvass, which was to mend the sails upon occasion, the barrel of wet gun-powder. 特别是第三次,我把船上所有的粗细绳子通通取了来,同时又拿了一块备用帆布,那是备着补帆用的；我甚至把那桶受了潮的火药也运了回来
- The blare of the speaker burst upon our ears. 扩音器的噪音突然传进我们的耳中。
- He tried to exercise an undue influence upon his colleagues. 他想对他的同事施加不适当的影响。
- He talks about his work upon every occasion. 在所有的情况下他都只谈工作。
- 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。
- Our room opened upon a view of the bay. 从我们房间可以看到海湾。
- She preened herself upon her beauty. 她为自已的美貌感到自满。
- Such a demand borders upon folly. 提出这种要求简直是愚蠢。
- Jim is a warmhearted person to come and go upon. 吉姆是个热心人，可以信赖。
- He'll be bursting in upon us at any moment. 他随时可能出现在我们眼前。
- It is possible that upon such an occasion a battle ensued, with sharks being driven away or killed. 在这样的情况下接着发生一场搏斗是可能的，其结果鲨鱼不是被赶走就是被杀死。
- A body of the enemy hung upon their rear. 一伙敌人紧紧地跟在他们的后面。
- I am sorry to have to inflict myself upon you. 很抱歉，我不得不打扰你。
- I come upon a group of children play in the street. 我遇到一群孩子在街上玩耍。
