The first one can be handled by what is know as progressive enhance or graceful degradation.
第一个级别的可访问性可以通过所谓的“逐步加强（progressive enhance）”或着“优雅降级（grace degradation）”来实现。
PHP's array_filter is an example of what is know in functional programming as a higher-order function.
php的array _ filter是函数式编程语言中高阶函数的一个例子。
The software works for problems whose form is know but whose particulars aren't; slider bars allow users to set the values for which they want the problems solved.
这个软件可以用来解决那些模型已知，详细结果却未知的问题；滚动条允许用户设置他们希望解决的问题的参数值。
Depending on what kind of chemistry you go in to, you might accidentally memorize parts of the table, which is fine, but what you really want to know how to do is know how to use the periodic table.
取决于你今后从事哪个方向的化学研究，你可能会不经意地记住周期表的某一部分，这就够了，但是要注意，你真正需要知道的是如何使用元素周期表。
The telescope that took the picture is know as the New Solar telescope which USES adaptive optics, parts that change to adapt to disturbances in the atmosphere and correct distortions in the signals.
拍摄照片的是大熊湖太阳天文台新望远镜，采用自适应光学技术配件以便校正大气扰动误差，调节信号畸变。
"You Don't Know Paris" is one of the most beautiful ballads that he ever wrote.
《你不了解巴黎》是他写过的最优美的流行情歌之一。
It's crazy, I know, but there it is.
我知道，那很疯狂，不过情况就是如此。
I know we're friends, but this is strictly business.
我知道我们是朋友，但这完全是公务。
你知道她多么容易生气。
It must be worrying for you not to know where he is.
你不知道他的下落一定很着急。
I know that this is a bad time to ask for help.
我知道在这时候要求帮助不合适。
He admits he doesn't even know when his brother is in town.
他承认甚至不知道他的兄弟什么时候在镇上。
Sorry, I don't know where the bank is. I'm a stranger here myself.
对不起，我不知道银行在哪儿。我不是本地人。
You don't know how good it is to speak to somebody from home.
你不知道跟家里来的人说说话有多好！
I have to know exactly why it is I'm doing a particular job.
我必须确切地知道我为什么做某项工作。
I'm sorry to trouble you, but I wondered if by any chance you know where he is.
对不起打扰您了，我想问问您是否碰巧知道他在哪里。
Most of us will know someone who is always learning new skills, or studying new fields.
我们大多数人都会认识一些总在学习新技术或研究新领域的人。
We've no idea what his state of health is but at least we know he is still alive.
我们不清楚他健康状况怎样，尽管如此我们知道他还活着。
There is one thing I would like to know – What is it about Tim that you find so irresistible?
有一件事我想知道–蒂姆到底有什么让你觉得那么不可抗拒？
What is it? Do you know what is it?
那是什么？你知道那是什么吗？
I'm damned if I know who he is.
我根本不认识他。
Every child needs to know that he is loved.
每个孩子都需要知道自己是有人爱的。
This is confidential, but I know that I can rely on your discretion.
这是机密，不过我知道你靠得住。
She does not know if he is alive or dead.
她不知道他是活还是死。
How do we know that the signature is contemporaneous with the document?
我们怎样才能知道这个签字和文件是同一个时间的呢？
As you know, Julia is leaving soon.
你是知道的，朱莉娅马上要离开了。
I know this is an imposition. But please hear me out.
我知道这是个不合理的要求，但请听我把话说完。
I don't know if the painting is authentic.
我不知道这幅画是不是真迹。
We know that taste in art is a subjective matter.
我们知道艺术品味是个主观问题。
Reform, as we know, is the enemy of revolution.
革新，如我们所知，是革命的敌对面。
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