我们如何知道何时投资升级？
那么我们如何知道哪些光谱模式与哪些元素相匹配呢？
So how do we know which spectral patterns match up with which elements?
我的意思是，研究人员如何知道大象或黑猩猩是否认识自己？
I mean, how do researchers know if elephants or chimps recognize themselves?
首先我们如何知道作者在那儿，其次，我们是否应该诉诸作者的权威。
It's a question rather of how we know the author to be there firstly, and secondly, whether or not we should appeal to the authority of an author.
每一集都将聚焦于一个不同的科学领域，告诉我们，我们知道什么，我们是如何知道的，以及我们仍然不知道什么。
Each episode will focus on a different area of science and tell us what we know, how we know it, and what we still don't know.
我战战兢兢问她如何知道号码的。
我们如何知道，镁会还原四氯化钛？
您如何知道哪些元素检出了？
如何知道结果是否是最好的？
How do you know if the results are the best results? A cluster can be broken down into the following major subsystems?
如果服务提供者停止工作，您如何知道呢？
例如，流程如何知道某个旅行预定的状态。
For example, what if the process has to do with finding the status of a certain travel reservation.
真正的问题是，客户端包如何知道注册的服务包？
The question really is, how does the client bundle know about the registered service bundles?
如果没有，他们如何知道你的新生意和新业务呢？
If not, how are you going to let them know that you're offering a sale or a new service?
如何知道所使用的提供者支持哪些属性呢？
How do you know what properties are supported by your provider?
如何知道吊带需要调节？
如何知道脾脏需要切除？
他们如何知道自己已经完成服务实现工作了呢？
How will they know when they've finished implementing the service?
EventThread如何知道存在未决的更新呢？
我们如何知道现在拥有哪个所需的能力，并且到什么程度？
How do we know which of the needed capabilities we have now, and in what degree?
如何知道自己在运行单处理器还是多处理器内核？
How do I know if I am running a uniprocessor kernel or a multiprocessor kernel?
比如，一个大脑区域如何知道将哪一个信号发送给其他脑区。
For example, how one area of the brain knows which signals to send to other parts.
可以加载到浏览器，但是如何知道什么时候加载的？
I can load it into a browser, but how can I tell when it's arrived?
那么，我们如何知道何时需要防止引起反感而何时则不必担心？
问题出来了：人们如何知道什么时候回归测试完成了？
The question then arises: How does anyone know when regression testing is complete?
研究者计划尝试新的方式来测试老师如何知道怎么去教一门课程。
Researchers plan to test a new measure that examines what a teacher knows about how to teach a subject.
所以当你握手的时候，如何知道最简单的问候是最好的交流方式呢？
So, if you are shaking hands, how do you know the best way to communicate a simple greeting?
客户端如何知道服务器实际上就是所期望使用的服务器呢？
How does the client know that the server is in fact the intended server?
jsp容器如何知道自定义标记的哪些属性是必选的哪些是可选的？
How does the JSP container know which attributes of a custom tag are required and which are not?
框架如何知道服务器可用与否或连接丢失以后何时它会再次可用呢？
How does the framework know when the server is unavailable or when it becomes available again after connectivity is lost?
框架如何知道服务器可用与否或连接丢失以后何时它会再次可用呢？
How does the framework know when the server is unavailable or when it becomes available again after connectivity is lost?
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