How sure would he need to be about the identity of an attacker to "fire back"?
为确定攻击者身份并“反击”，他需要多大把握？
How sure are we that this kind of change in the environment would not lead to catastrophe?
我们有多大把握这种环境变化不会引起灾难？
"How sure are you?" Annabel asked, looking at the stars below. They couldn't see Lionel anywhere. Now they would have to trust their faith.
“你怎么知道？”安娜·贝利看着下面的星星问。他们根本就看不见莱昂内尔在哪。不过他们现在不信也不行了。
This depends on a number of factors, notably how sure you are of what you want you study and how many academic interests you have outside of your expected major.
这取决于许多因素，尤其是你有多确定自己想学什么，以及在你期望的专业之外还有多少别的学术兴趣。
The fact that Kate, normally so discreet, felt confident enough to mention this shows how sure she was that she would be wearing a ring then and not several years later.
所以，当时的情况就是，一向谨慎的凯特，在这件事儿上太过自信了，甚至说，用不了几年，她就能戴上王室的戒指了。
I'm not sure how we'll reach that better place beyond the horizon, but I know we'll get there.
我不确定我们怎么到达地平线之外更加美好的地方，但是我们知道我们将会到达那里。
Each cluster includes a pair of eyes with a sophisticated lens, retina, iris and cornea. Scientists aren't sure how they process what they see.
每组包括一对拥有复杂晶状体、视网膜、虹膜和角膜的眼睛。科学家们还不确定它们如何处理它们看到的东西。
Without him around, I am not sure how I could do a senior thesis on The Canterbury Tales books.
如果没有他在身边，我不确定自己是否能完成这篇关于坎特伯雷故事集的毕业论文。
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。
I am not precisely sure how long I stayed frozen in that position, but the next thing I recall is the apparition vanishing before my eyes.
我不能精准地确定我在那个位置上呆了多久，但我记得的下一件事就是那个幽灵在我眼前消失了。
If we know around how old the Basin is, I'm not sure that's reason enough to go to the Moon again.
如果我们知道盆地的年龄，我不确定这是否足以成为再次登月的理由。
I'm sure almost everyone uses the internet now—but I wonder how we'd cope without it.
我敢肯定现在几乎每个人都在使用互联网——但我想知道，如果没有它我们该怎么办。
To put it another way: How can we make sure that the thinking of intelligent machines reflects humanity's highest values?
换句话说：我们如何才能确保智能机器的思维反映了人类的最高价值观？
Miss Allan beamed at him. "You are clever to guess. I'm sure I don't know how you did it."—"Deduction," James said.
阿伦小姐对他笑道：“你很会猜，我确实不知道你怎么办到的。”——杰姆斯说：“推论。”
It has set us back in so many respects that I'm not sure how long it will take for us to catch up.
我们在很多方面都被延误了，不知道需要多久才能赶上。
If you're not sure how to talk to them about it, ask a trusted friend for advice.
如果你不确定该如何和他们谈论这件事，可以向你信任的朋友寻求建议。
Yet, as I thought about Juan's question, I was not sure how much more we could really rule out.
然而，当我思考胡安的问题时，我不确定我们还能排除多少可能性。
Summarize the points made in the lecture, being sure to explain how they oppose specific points made in the reading passage.
总结演讲中提出的观点，一定要解释他们如何反对阅读文章中提的具体观点。
I am sure you all know from physics class about how light moves in microscopic ways and that we can only see light when the wavelength of that light is in a specific range.
我相信，你们在物理课上都学过光是如何以微观的方式运动的，以及只有在光的波长在特定的范围内时我们才能看到光这一事实。
It's a chance to make sure we're working well together, and that everyone knows how the residents are, and what's going on in the home.
这是一个确保我们合作愉快的机会，而且每个人都知道居民的情况，知道家里发生了什么事。
Three friends had declared bankruptcy and weren't sure where or how they were going to live.
有三个朋友宣布破产，他们不知道自己将在哪里生活，也不知道如何生活。
We have been talking about how sea animals find their way underwater, how they navigate, and this brings up an interesting puzzle, and one I'm sure you'll all enjoy.
我们已经教过海洋动物在水下如何定位，也讲了它们如何辨别方向。这就引出了一个有趣的谜题，我相信大家对此都很感兴趣。
We don't know for sure how much mass our Sun's lost over the last four billion years.
我们不知道我们的太阳在过去的40亿年里损失了多少质量。
There are no prizes of course, but I'm sure you'll be surprised by how much you've learnt.
当然没有奖品，但我相信你会惊讶于自己学了这么多东西。
I'm sure you all know how important recycling is. Recycling is when you take old things and turn them into new things.
我相信你们都知道回收利用的重要性。回收利用是指回收旧物品，并且把它们变旧为新。
He wanted to draw a picture of it, but he wasn't sure how to spell "dachshund", so he simply wrote "Hot Dog".
他想给它画一张图，但是他不知道如何拼写 “dachshund”，所以他就简单地写了 “Hot Dog”。
When you see your child exhibit respectful behaviour, make sure he knows just how proud you are of him.
当看到自己的孩子显示出尊重别人的行为时，你要让他知道你是多么为他感到骄傲。
Scientists aren't yet sure how these chemicals might harm animals.
科学家们还不确定这些化学物质会如何伤害动物。
Scientists aren't yet sure how these chemicals might harm animals.
科学家们还不确定这些化学物质会如何伤害动物。
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