如果那时我们被发现了，我不知道我们会有什么后果。
If we had been spotted at that point, I don't know what would have happened to us.
如果你不知道自己的胆固醇水平，最好去查一下。
If you don't know your cholesterol level, it's a good idea to have it checked.
如果无法传送出去，我不知道该拿这情报怎么办。
I do not know what to do with the information if I cannot pass it on.
如果你不知道什么是鹰头狮，请看图片。
如果人们不知道自己吃了多少，他们就很难坚持节食。
If people do not know how much they are eating, it can be really hard for them to stick to a diet.
准备出国旅行真的会很有压力，尤其是如果你不知道会发生什么。
Preparing to go traveling abroad can be really stressful, especially if you don't know what to expect.
如果选民不知道如何使用电脑，你怎能期望他们通过电脑完成投票过程？
If the voters do not know how to use a computer, how do you expect them to finish the voting process through computers?
如果你想搜索图书馆藏书，却不知道作者的名字、书名或文章的确切名称，你必须设置关键字查询。
If you want to search the library holdings and don't know the author's name or the exact title of the book or an article, you have to set up a keyword search.
我想很多客户都会被这个问题困扰，如果我去购物，我不知道我是否想要一些业务代表过来问我问题。
I would think that a lot of customers would be bothered by, if I'm shopping, I don't know if I'd want some business representative coming up to me and asking me questions.
如果有人发现了，我真不知道该怎么办。
如果您不知道该怎么做，请尝试以下四个步骤。
If you don't know how to do, please try the following four steps.
如果你现在不知道你自己多大，你觉得你应该是多大？
她不知道如果父母发现了她会怎么样。
如果你不知道自己想要什么，你可能会到头来得到自己不想要的东西。
If you don't know what you want, you might end up getting something you don't want.
目前还没有关于怀孕时低碳水化合物饮食影响的研究，因此如果它对胎儿有什么影响也是不知道的。
There have been no studies of the effects of a low carbohydrate diet on pregnancy, so its effect on the fetus, if any, is unknown.
如果没有广告，我们就不知道有什么好买的。
We wouldn't know what there was to buy if we didn't have advertisements.
因为如果捕食者不知道你在那里，它就不会试图吃掉你。
Because if the predator doesn't know you are there, it is not going to try to eat you.
当菲利普斯问她，如果他不阻碍她，她会去哪里时，她高兴地回答说：“哦，我也不知道我会在哪里！”
When Phillips asked her where she would go if he wasn't in the way, she replied cheerfully, " Oh, I wouldn't know where I was!"
他不知道，如果她知道了，她会不会同情他呢？
在这个时候，如果你不知道自己有多少资本，就很难向别人推荐如何投资。
It's hard to recommend how to invest at this time without knowing how much capital you have.
与其说“如果我们设定了季度末的最后限期，我们将永远无法完成”这样的话，不如说：“仅代表个人看法，但我不知道我们怎样才能在截止日期前完成。”
Instead of saying something like, "If we set an end-of-quarter deadline, we will never make it," say, "This is just my opinion, but I don't see how we will make that deadline."
这是非常有用的，因为有些物体是看不见的，如果没有射电望远镜我们甚至不知道这些物体。
This is extremely useful, because there are objects that can't be seen, objects that we wouldn't even know without radio telescopes.
我不知道如果有一天我死了，他们会不会想念我。
爱丽丝想：“如果他不开始，我真不知道他怎么结束。”
Alice thought to herself, "I don't see how he can even finish, if he doesn't begin."
例如，我们甚至不知道有多少恒星有行星，我们当然也不知道如果有适当的条件，生命自然出现的可能性有多大。
We do not even know, for example, how many stars have planets, and we certainly do not know how likely it is that life will arise naturally, given the right conditions.
如果你不知道如何交朋友，找出原因。
如果你不知道自己的血型，人们可能会感到惊讶。
People might be surprised if you don't know your blood type.
如果你不知道“miner”的意思，试着看单词的组成部分。
If you don't know the meaning of miner, try looking at parts of the word.
如果约翰逊不知道号码，就不会接电话。
Johnson won't answer the phone if he doesn't know the number.
如果你不知道自己上大学的目的，上大学有什么用？
What is the use of going to college if you don't know what you're going there for?
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