肯定的：certain的用法大全
You see, I…I am crazy. I take the newer medications, but I still see things that are not here. I j.st 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……我是瘋的。我服用最新的藥物，但我仍然看的見那些不存在的東西。我只是選擇了不去理睬他們。就好像一頓心靈快餐，我選擇不去縱容某些食慾。比如說我症狀的食慾。還有我虛構和想象的食慾。
——《美麗心靈》
一、你知道certain有幾種含義嗎？
adj.
1.確實的，有把握的，毫無疑問的 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.
我相信到本世紀末我們的國民生產總值肯定會超過翻兩番的目標。
2.必然的，必定的，肯定的，確定的，無疑的 that you can rely on to happen or to be true
He had been there four times to my certain knowledge.
我確定他去過那兒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.
一點不損耗就把熱轉換成某種能是不可能的。
pron.
某些，某幾個used for talking about some members of a group of people or things without giving their names
二、下面我們來學習一下含有certain的常見短語
for certain
1.肯定地
三、接下來，做個小測試吧
The show appeals to an audience of a ______ age.
某個年齡層的觀衆對這個節目感興趣。
