Nobody knows for sure whether the theory is true or not, but it's a fact that bees are disappearing in very large numbers.
没有人确切地知道这个理论是否正确，但事实是蜜蜂正在大量消失。
One thing is for sure, if or when the U.K. leaves the EU, it will erect new logistical and economic barriers, and no one knows how divisive they will be.
有一件事是肯定的，如果或当英国离开欧盟时，英国将会建立新的物流和经济障碍，没有人知道这些障碍会造成多大的分歧。
We are not sure how well we can reproduce the melodies or rhythms, because they were apparently improvised in many cases.
我们不确定我们能多完整地重现旋律或节奏，因为它们显然在很多情况下是即兴创作的。
If you are on the receiving end of a "new" thank you, you can respond with a simple "no problem”, or "sure”.
如果你收到“形式新颖的”谢谢，你可以简单地回答“noproblem（没问题）”或“sure（当然）”。
If you have strong and healthy good habits, it doesn't matter whether you fail or not today, because you are sure to succeed in the end.
如果你有强壮健康的好习惯，今天失败与否都不重要，因为你最终一定会成功。
And if you keep your curtains closed, burglars are less likely to try and break in because they can't be sure whether someone's home or not.
如果你把窗帘拉上，窃贼就不太可能试图破门而入，因为他们无法确定是否有人在家。
Listen, if you talk to Elizabeth or anything make sure you let everyone know, will you.
听着，如果你和伊丽莎白讲话或什么的，一定要让每个人都知道，你能做到吧。
I wasn't sure whether to laugh or to reciprocate with a remark of my own.
我不知道是该笑一笑还是该说点什么作为回应。
He prowled around the room, not sure what he was looking for or even why he was there.
他在房间里悄悄地走来走去，不知道自己在找什么，甚至不知道自己为什么在那里。
Take the long lost art of saying "Thank you" like wearing a little makeup or making sure your hair is neat.
把失传已久的说“谢谢”的艺术当成像化点妆或者确保你的头发整洁一样。
Take the long-lost art of saying "Thank you" like wearing a little makeup or making sure your hair is neat.
把失传已久的说“谢谢”的艺术看做化点妆或者确保你的头发整洁。
We have to test a number of blade types to avoid this happening or at least make sure it does not damage the turbines or reduce performance.
我们必须测试多种类型的叶片来避免这种情况的发生，或者至少确保它不会损坏涡轮或降低其性能。
Don't worry if you are not sure where you're headed or what your long-term goals are.
如果你不确定你的目标是什么，或者你的长期目标是什么，不要担心。
Be sure not to take extra breaks or too long breaks as it can affect your plan.
确保不要有额外的休息或太长时间的休息，因为这会影响你的计划。
Be sure to apply sunscreen, or just use your facial moisturizer with SPF, all the way down past your neck though your chest each morning.
一定要涂抹防晒霜，或者只使用含有 SPF 的面部保湿霜，每天早晨从你的脖子一直到你的胸部。
Often, students are not sure whether they have the android or the real teacher when they go to class.
当学生们去上课时，他们经常不确定他们是有机器人还是真的老师。
Splitting kids, or adults, into ever-tinier categories has proved a sure-fire way to boost profits.
事实证明，将孩子或成人分成更小的类别一定能提高利润。
Regardless of the weather or the distance, Paul Wilson will make sure low income students in his neighbourhood arrive at their college classes on time.
不管天气如何，距离有多远，保罗·威尔逊都会确保附近低收入家庭的学生准时上大学。
Can anyone be sure if the decline is really caused by the hunting or by climate change?
有人能确定这种下降到底是由捕猎还是气候变化引起的吗?
You're not sure if you're going to read something that's related to literature, or to science.
你不确定是读点跟文学相关的还是读点跟科学相关的内容。
Be sure to include in your notes information that your teacher repeats or writes on the blackboard.
一定要在你的笔记中包含老师重复或写在黑板上的信息。
Can you be sure you've noted every snack bar in your car, or every handful of nuts at your desk?
你能确定你已经记下了你车里的每一个存放零食的地方，或者你桌子上的每一把坚果了吗？
And when experimenters record the time it takes game players to read "aggressive" or "non-aggressive" words from a list, can we be sure what they are actually measuring?
当实验者记录下游戏玩家从列表中阅读“攻击性”或“非攻击性”词汇所花的时间时，我们能确定他们实际上在测量什么吗？
For example, they must make sure they construct measures that are meaningful for each of the cultural or ethnic minority groups being studied.
例如，他们必须确保他们制定的措施对每一个被研究的文化或少数民族群体都是有意义的。
You can use "make sure" to declare that you want something or something needs to be done.
你可以用“makesure”来声明想要某东西或某事必须做到。
He or she can be sure that the overseas effort is central to the company's plan for success, and that promotions often follow or accompany an assignment abroad.
他或她可以确信的是，海外工作是公司成功大业的核心，而且在完成海外任务之后或分配海外任务的同时，会得到升职。
To be sure, some critics throughout the years have argued for Austen's affinities with one or more of the male Romantic poets.
可以肯定的是，多年来，一些评论家一直认为奥斯汀与一位或多位男性浪漫主义诗人有着密切的联系。
Be careful if you have an outdoor fire or barbecue — make sure ashes are cold before leaving.
如果你在户外生火或烧烤，一定要小心，离开前一定要确保炉灰是冷的。
You may keep the book in the car, or into the office or to anywhere you go, unless you're sure you won't have time to read.
你可以把书放在车里、办公室里或带去任何你要去的地方，除非你确定你没有时间阅读。
Also, make sure you travel with proper medical insurance, so that if you are sick or injured during your travels, you'll be able to get treatment.
另外，确保你在旅行时买了正确的医疗保险，这样，你在旅行中生病或受伤时，就能得到治疗。
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