肯定的：certain的用法大全

英语自学网

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         You see, I…I am crazy. I take the newer medications, but I still see things that are not here. I just choose not to acknowledge them. Like a diet of the mind, I choose not to indulge certain appetites. Like my appetite for patterns. Perhaps my appetite to imagine and to dream.
        ——A Beautiful Mind
        你要明白，我……我是疯的。我服用最新的药物，但我仍然看的见那些不存在的东西。我只是选择了不去理睬他们。就好像一顿心灵快餐，我选择不去纵容某些食欲。比如说我症状的食欲。还有我虚构和想象的食欲。
        ——《美丽心灵》
        一、你知道certain有几种含义吗？
        adj.
        1.确实的，有把握的，毫无疑问的 firmly believing sth; having no doubts
        I am certain that by the end of the century we can surpass the goal of quadrupling the GNP.
        我相信到本世纪末我们的国民生产总值肯定会超过翻两番的目标。
         
        2.必然的，必定的，肯定的，确定的，无疑的 that you can rely on to happen or to be true
        He had been there four times to my certain knowledge.
        我确定他去过那儿4次。
         
        3.某一 used to mention a particular thing, person or group without giving any more details about it or them
        It is impossibly for heat to be converted into a certain kind of energy without something lost.
        一点不损耗就把热转换成某种能是不可能的。
         
        pron.
        某些，某几个used for talking about some members of a group of people or things without giving their names
         
        二、下面我们来学习一下含有certain的常见短语
        for certain
        1.肯定地
         
        三、接下来，做个小测试吧
        The show appeals to an audience of a ______ age.
        某个年龄层的观众对这个节目感兴趣。