People may not be sure about life on Mars until a sample of life is brought back.
人们可能不确定火星上是否有生命，直到一个生命样本被带了回来。
Before you buy any wireless equipment, you need to be sure about what you're doing.
之前，你买任何无线设备，你必须要知道你在做什么。
But Professor Bedau says that nobody can be sure about the results of making new forms of life.
但是Bedau教授说没有人对制造新型生命的后果打保票。
No one can be sure about his future. Future is not what fortuneteller tells you. It is created by yourself.
不谁可能对未来一目了然，将来并不是靠算命先生那张嘴说出来的，而是靠你本人发明出来的。
Good quality is important to them, and they believe they can not be sure about the quality of the things on TV.
好的质量对于他们来说很重要，而且他们相信他们无法确定电视上的商品的质量。
For the future, I can only be sure about one thing: most of the people will choose not to wake up in the Matrix.
对于未来，我唯一能够确定的是：大多数人都会选择不从“母体”中醒来。
There were many I didn't know, and others I couldn't be sure about because they were so covered in green parasites.
这里有许多我不认识的树，还有有一些树我没法确认，因为它们都覆盖在了密密麻麻的绿色藤蔓植物下。
As far as I am concerned, the only true stupid thing you can do is not to be sure about something and don't dare to ask!
在我看来，最愚蠢的事其实是知道自己有问题，但却不敢问。
No one can be sure about his future. Future is not what fortune teller tells you. It is created by yourself. ——Bill Gates.
没有谁能够对未来了如指掌，未来并不是靠算命先生那张嘴说出来的，而是靠你自己创造出来的。 ——比尔·盖茨。
I can get along with everyone. All I want to be sure about when it comes to my boss and colleagues is that they are qualified for the job we do.
我和每一个人都可以处得很好，我只希望我的上司和同事有能力做好我们的工作。
If I purchase drugs from a company that has multiple facilities, how can I be sure about the quality of the specific compounded drugs I purchase?
如果我从有多个工厂的一个公司购买药物，我怎么确定购买的特效调制药品的质量？
Rewrite has its advantages however, in most situations it is a riskier option and the teams can never be sure about the outcome. As Joel on Software suggested
重写也有其自身的优势，然而在很多情况下它是一种有风险的选择，并且团队可能永远都不确定产出物的情况。
Here we will give you some names of the sites of agencies and airline services that provide good offers so that you can go through those websites to be sure about the offers they offer.
这里我们给你一些名字，盘中机构和航空公司提供良好的服务，从而提供你可以通过这些网站可以知道它们提供投标。
When people are having a picnic, but it begins to rain, they will be so sure about something that shows the weather is going to be fine very quickly.
当人们正在野餐，但开始下雨时，他们会非常肯定地认为天气会很快好起来。
In the rare chance that there is a microorganism that can make you sick on the exact spot where the food dropped, you can be fairly sure that the bug is on the food you are about to put in your mouth.
极少数情况下，有一种微生物可以在食物掉落的那一刻让你生病，你可以十分确定这种细菌就在你准备放进嘴里的食物上。
Make sure to be honest about how you feel and how long you've felt that way.
一定要诚实地说出你的感受以及你有这种感觉多久了。
Traditional dance teachers did not welcome it because they thought it was not even a real dance and were quite sure about its demise but Swing has proved them wrong; it continues to be one of the world's most fun dances.
传统舞蹈老师不欢迎它，因为他们认为它甚至不是一个真正的舞蹈，并非常确定它会消亡，但摇摆舞证明他们错了；它仍然是世界上最有趣的舞蹈之一。
It could be anything—gardening, cooking, music, sports—but whatever it is, make sure it's a relief from daily stress rather than another thing to worry about.
它可以是任何事情——园艺、烹饪、音乐、体育——但无论它是什么，确保它能缓解日常压力，而不是另一件需要担心的事情。
Sure, you still might be apprehensive about following your dreams after this call, but at least you'll have the inspiration to take action anyway.
当然，你在这次客服中心之后你或许还会对追寻你的梦想感到焦虑不安，但至少会让你有灵感去采取行动吧。
And we can be doubly sure about his father's influence because those who know Obama well testify to it.
而且关于其父的影响力这一点，我们可以得到加倍的确认，因为认识奥巴马的人可以证实。
Be sure to let your instructor know about any orthopedic problems or special needs you may have before the class begins.
确信你的教练知道你的整体状况，或是一些特殊需要。
If you cannot know whether you are in the real world or in the word of a computer simulation, you cannot be sure that your beliefs about the world are true.
如果你无法知道自己是身处现实世界还是受困于电脑模拟情境，那么你就不能确定自己对于世界的信仰是正确的。
With so much modern clothing that is "inspired" by vintage styles, you will want to be sure you are about to purchase an authentic piece of vintage clothing.
因为有很多当代的服装是受到经典服装式样的启发，所以你必须保证你将要购买的一套衣服确实是经典服装。
That is what one wants to be sure of... Wood is a pleasant thing to think about.
我们想弄清楚的也就是这个问题。木头是一件值得加以思索的愉快的事物。
I'm seeking a tenant for the Grange, 'he answered;' and I want my children about me, to be sure.
“我要为田庄找一个房客，”他回答，“而且我当然要我的孩子们在我身边。”
The team used several methods to date a variety of material from the site near Puebla, Mexico, in order to be sure they were right about the age.
该小组运用多种方法对墨西哥普埃布拉附近遗址的各种物质进行了年代测定，以此确保他们得出的结果是正确的。
The team used several methods to date a variety of material from the site near Puebla, Mexico, in order to be sure they were right about the age.
该小组运用多种方法对墨西哥普埃布拉附近遗址的各种物质进行了年代测定，以此确保他们得出的结果是正确的。
The team used several methods to date a variety of material from the site near Puebla, Mexico, in order to be sure they were right about the age.
该小组运用多种方法对墨西哥普埃布拉附近遗址的各种物质进行了年代测定，以此确保他们得出的结果是正确的。
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