【certain音标】 英[ˈsɜ:tn] 美[ˈsɜ:rtn]
【单词释义】 certain是什么意思：
adj.某一；必然的；已确定的
pron.[动词用复数]某些
[单词分级] 中考英语词汇
[反义词] uncertain 不确定的
【certain形近词/近似词】
uncertain adj.不确定的
pertain vi.适合，适用；关于，有关；生效，存在
curtain n.窗帘，门帘
ascertain vt.弄清，确定，查明
entertain v.热情招待（款待）；使有兴趣；娱乐；抱着，怀有
【近义词解析】
◇ 确信的
certain (adj. 肯定的，确信的) 指确定无疑的，表示说话人有确切的理由或不容置疑的证据，语气较强，通常作表语，多用于肯定句或正式的书面语中，常可与positive 换用，但不可单独用作回答。He is certain/positive that the fruit is ripe.
confident (adj. 确信的，有把握的) 指确信某事会以自己想要或期望的方式发生的，通常作表语。The committee is confident of success.
convinced ([专八/托福]adj. 确信的，信服的)
指对某事深信不疑的，通常作表语，常后接介词 of 或 that 从句。
positive (adj. 确信的，肯定的) 指对某事物的正确性或真实性绝对肯定的，通常作表语，可单独用作肯定回答，常后接介词 about/of 或 that 从句。
sure (adj. 确信的，确定的) 指主观上对某事物的正确性或真实性没有疑虑的，常可与 certain 换用，但语气稍弱，通常作表语。
【单词例句】
◇ Last year, scientists saw some monkeys rubbing themselves with a certain kind of insects to protect themselves from fierce mosquitoes biting. According to the result of the inspection, they found that the insect contains a powerful drug, so local farmers were employed to catch the insects.
去年，科学家观察到猴子在身上擦某种昆虫来保护自己不受凶猛的蚊子的叮咬。根据检查的结果，他们发现这种昆虫含有一种具有强大效力的药物，于是，当地的农民都被雇来抓虫子。
---- Wildlife Protection
◇ "Music has a very powerful impact on the brain. It affects mood, mental performance and physical performance," says Dr. Spelman in a media release. "Many people find that listening to certain types of instrumental music can help them with their productivity levels. The music can function as a sort of 'white noise', cancelling out potentially distracting ambient noise."
斯佩尔曼博士在媒体发布会上表示：“音乐对大脑有着非常强大的影响，它会影响情绪、心理表现和身体表现。许多人发现，听某些类型的器乐可以帮助他们提高工作效率，音乐可以起到某种白噪音的作用，抵消了环境噪音的潜在干扰。”
---- Listening to classical music at work boosts productivity
◇ Do you really need to worry about this? The short answer is, not really. Injuries from microwave radiation are very rare, according to the US Food and Drug Administration. However, there are certain precautions you can take to keep yourself safe when using a microwave oven.
你真的需要担心这个吗？简短的答案是，并不需要。美国食品和药物管理局（FDA）称，微波辐射造成的伤害非常罕见。不过，使用微波炉时，你可以采取一些预防措施来保证自己的安全。
---- Is It Safe to Stand in Front of Microwave Ovens?
◇ To do this, they asked the human guinea pigs to list attributes and emotions that they associate with certain colors in the hopes of also finding out what different hues mean to different people, and what may influence this.
为了达到实验目的，他们让实验对象列出特定颜色相关的属性和代表情绪，既希望找出不同的颜色对不同的人意味着什么，也希望弄明白这其中有哪些影响因素。
---- What is the world's most relaxing color?
◇ Employers are looking to find out how you prioritize certain tasks and what sort of language you'll use to communicate effectively.
雇主想知道你如何对工作任务划分优先级，以及你用什么样的语言来进行有效沟通。
---- Five most common questions asked at a job interview
◇ "It's not certain however that they can be a broad solution for the final kilometre of delivery. Because the client still has to come down to get his package," added Mr Shao.
他补充说：“但是不能确定它们能否成为最后一公里配送的广泛解决方案。因为客户还是要下楼取包裹。”
---- 'Little yellow horse' robot delivers useful service in China
◇ Now studies have revealed there are certain bedtime poses people should stop adopting due to the negative effects they have on their health.
如今有研究显示，有一些睡姿是应该避免的，因为它们对健康有害。
---- The Best Positions in Bed Revealed
◇ As a result, we have a deeper connection to red than any other color on the spectrum and we react to it in certain ways that actually play to fast food companies' advantage.
因此，相较于其他颜色，人类和红色有着更深层的联系，而我们对红色的反应恰好能够被快餐公司利用。
---- Why so many fast food logos are red
◇ Certain parts of the skin have a larger influence than others. These areas are called pulse points.
有些特定部位的皮肤对下丘脑的影响比其他部位更显著，这些位置就是脉搏点。
---- How to keep your body cool
◇ KPMG and Deloitte offer four-day work weeks to some employees (with certain conditions attached), while Google allows some employees full control over 20% of their working week, hoping that the creative freedom will lead to new ideas and innovations.
毕马威和德勤的某些员工可以每周工作四天（但是有一定的附加条件）。谷歌则允许一些员工随心支配工作周中超过20%的时间，希望这种创作自由可以引发新想法和创意。