我们已经介绍过三重积。
我们学过的另一种积分是三重积分。
每一个都会开启三重日期门户。
这就是空间区域中的标准三重积分。
This is just your standard triple integral over a region in space.
几个星期后，我们会学习三重积分。
这是建立三重积分的绝佳练习。
See, this is actually good practice to remember how we set up triple integrals.
现在，在球坐标中进行三重积分。
So now we're going to triple integrals in spherical coordinates.
这等价于在这个区域内部的三重积分。
这和计算其他三重积分的方法是相同的。
It's just the same way that you would compute any other triple integral.
先看看怎么，在球坐标中建立三重积分。
Well, we have to figure out how to set up our triple integral in spherical coordinates.
比如给“三重字母分数”一个全新的定义。
解释“三重底线”的概念往往是最大的障碍。
Explaining the notion of a 'triple bottom line' is often the biggest hurdle.
我们面临地震、海啸和核辐射泄漏三重威胁。
It's a triple threat with the earthquake, tsunami and the nuclear radiation leaks.
我们学过了三重积分。
这与三重积分不同。
这些都是三重积分的例子，从概念上讲是相同的。
OK, so these are just formulas to remember for examples of triple integrals It doesn't change conceptually.
小泉有三重成就。
三重教育取决于中等教育中的选择教育。
Tertiary education depends on the education chosen in secondary education.
持球站在三分线外，面向篮筐，摆好三重威胁姿势。
Catch the basketball behind the three-point line and square up to the basket in the triple threat position.
大体上纽约有三重属性。
当中法律措辞太多，还经常含有双重否定或三重否定。
The language is dense legalese, often containing double or triple negatives.
注意，三重引号可以轻松地处理多行XML文档。
Notice that the triple quotes handle the multiline XML document with ease.
我要把我的黑板分成三部分，在这我将要写三重积分。
OK, so I'm going to divide my blackboard into three pieces, and here I will write triple integrals.
中美洲受到地震、飓风和泥石流等自然灾害的三重威胁。
Central America gets hit by a triple threat of natural disasters: earthquakes, hurricanes and mudslides.
一旦需要计算这个积分，只需要计算这个函数的三重积分。
Once you have computed what this guy is, it's really just a triple integral of the function.
做三重积分，和二重一样，当然，我们会有更多的坐标系。
When we do triple integrals in space, well, it is the same kind of story, except now we have, of course, more coordinate systems.
也就是二重和三重积分的内容，以及平面和空间中的向量积分。
And so that was stuff about double and triple integrals and vector calculus in the plane and in space.
当地注册银行将允许在几年内实现“三重式”特定的资金比率。
Locally incorporated Banks will be expected to meet a trio of specific funding ratios within a couple of years.
双重认证变成了三重认证，虽然提高了安全性，但却更不方便了。
A two-factor authentication system has been replaced by a three-factor system which is more secure but less convenient.
我们目前已经学习了三重积分，以及如何在各种坐标系中建立它们。
We have been working with triple integrals and seeing how to set them up in all sorts of coordinate systems.
应用推荐