Certain claims are not defined by law - for instance, did you know that labels stating "fragrance" may be misleading because they are not required to specify any of the chemicals used in them?
有些宣传语并不是法律规定的——比如，你知道吗？标签上以香氛开头的产品可能误导消费者，因为它们并未被要求必须标明所含的所有化学物质。
Certain claims are not defined by law - for instance, did you know that labels stating "fragrance" may be misleading because they are not required to specify any of the chemicals used in them?
—有些宣传语并不是法律规定的——比如，你知道吗？标签上以香氛开头的产品可能误导消费者，因为它们并未被要求必须标明所含的所有化学物质。
Then the Lord said to him, "Know for certain that your descendants will be strangers in a country not their own, and they will be enslaved and mistreated four hundred years.
耶和华对亚伯兰说：“你要的确知道，你的后裔必寄居别人的地，又服事那地的人；那地的人要苦待他们四百年。
I do not know for certain what the future holds but I am confident that with hard work, a little bit of luck and a supportive network of friends, I can be as successful as I want to be.
我不确知未来，但我相信通过艰苦的工作加上一点点的运气和朋友们的帮助，我一定能够心想事成！
A certain daughter complained to her father about her life and how things have been so hard for her. She did not know how she was going to make it and she wanted to give up.
有一个女孩向她父亲抱怨她的生活，她觉得凡事都很艰难，不知该怎样挺过去，她想放弃。
And the same goes for you. If you do not understand certain American behavior or you want to know more about them, do not hesitate to ask them questions about themselves.
换成你也一样，如果你不理解某些美国人的行为或你想知道他们更多的东西，就毫不犹豫地去问他们。
As you know, nothing in the financial markets is for certain - certainly not when it comes to using technical indicators.
正如你所了解的，金融市场中没有任何事情是确定不变的，当然使用技术指标时也一样。
But we are not going to know for certain which approach makes sense until additional data is in.
但是我们不会知晓到底哪个方法行得通，直到获取了额外的数据。
For example, if you want to ensure that callers have permission to read a certain file, but you do not know the name of that file until run time, use an imperative demand.
例如，如果要确保调用方拥有读取某个文件的权限，但在运行时之前不知道要读取的文件的名称，此时请使用强制性要求。
For example, if you want to ensure that callers have permission to read a certain file, but you do not know the name of that file until run time, use an imperative demand.
例如，如果要确保调用方拥有读取某个文件的权限，但在运行时之前不知道要读取的文件的名称，此时请使用强制性要求。
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