如果你现在不知道你自己多大，你觉得你应该是多大？
他不知道，如果她知道了，她会不会同情他呢？
如果我的朋友想要辞职却不知该如何选择的话，我会首先建议她去找一份最符合她价值观的工作。
If my friend was thinking about leaving her career, but didn't know which one to choose, I would first recommend her to search for work that best fits her values.
我不知道如果有一天我死了，他们会不会想念我。
如果你的薪水似乎不知去向了，你可能已经陷入金钱陷阱。
If your paycheck seems to be disappearing into thin air, you may be stuck in money traps.
她不知道如果父母发现了她会怎么样。
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.
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?
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.
如果一个不知名的人进入家中，摄像头就会向主人发送警告，并在主人的智能手机上响起警报。
If an unknown person enters a home, the camera will send the owner a warning that will cause an alarm to sound on the owner's smartphone.
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.
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.
如果它们死了，我就会觉得自己是个坏孩子，不知怎么地，没有用心照顾它们。
If they died, I should feel as if I'd been a bad lad and somehow treated them heartless.
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.
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!"
如果这种病毒能够通过空气传播，或者如果一名感染者在不知情的情况下进入了人口密集的地区，那么埃博拉可能已经成为一种全球流行病。
If the virus had been capable of spreading through the air, or if one infected person had unknowingly entered a large population center, Ebola might have become a worldwide epidemic.
如果有人在徒步旅行中撞倒了几块岩石，他们可能在不知不觉中破坏了动物或有机体赖以生存的小气候。
If someone on a hike knocks a couple of rocks over, they could be unwittingly destroying a microclimate that an animal or organism relies on.
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."
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.
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.
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.
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