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.
如果你不知道什么是鹰头狮，请看图片。
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?
皮草正义项目的总监克里·麦克里说：“如果你不知道海狸鼠每年都在破坏大量的湿地，那么说使用皮草没有愧疚感听起来会很疯狂。”
"It sounds crazy to talk about guilt-free fur unless you understand that the nutria are destroying vast wetlands every year", says Cree McCree, project director of Righteous Fur.
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.
如果你不知道，没有人会知道。
尤其是如果你不知道你在忏悔什么。
Especially if you don't know what it is you're confessing to.
如果你不知道怎么做，参照上一条。
If you don't knowhow, imitate as described in the previous tip.
如果你不知道，你想去寻找吗？
如果你不知道就说不知道，不要编造。
Say you don't know if you don't know, don't make something up!
如果你不知道要去哪里的话就很难达到你的目标。
It's difficult to reach your destination if you don't know where you're going!
如果你不知道，网上的导航可是免费的。
如果你不知道，你又是怎样找到这儿来的？
如果你不知道，你可以使用通用名来占位。
特别是如果你不知道选择探索性测试的话。
如果你不知道这家公司的话，它很有可能就是个诈骗。
常言道，如果你不知道要去哪里，随便哪条路都可以。
As the old saying goes, if you don't know where you're going, any road can get you there.
如果你不知道如何到达那里，你需要地图了。
And if you don't know how to get there, you need a map, too.
如果你不知道他们的名字，那也很容易确认到-去问吧。
If you don't know their names, then it's easy to find out - just ask.
如果你不知道前进的方向，那么到达目的地会困难重重。
If you don't know where you are going, it's difficult to get there.
如果你不知道收支平衡点，你就是在盲目经营。
If you don't know your break-even point, you're running your business blindly.
如果你不知道你喜欢什么，那么你真的就迷失了。
如果你不知道你喜欢什么，那么你真的就迷失了。
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