Well, we can use the chain rule.
可以使用链式法则。
为了把这里的p变成,我们需要利用链式法则,好，让我们使用链式法则。
What does the chain rule tell us?
链式法则告诉了我们什么？
So, we have to use the chain rule.
这里我们利用链式法则。
And now I'm going to use the chain rule.
要用链式法则。
The other method is using the chain rule.
另外一种方法就是用链式法则。
With the chain rule, gives me a theta dot.
根据链式法则，我得到θ点。
I've seen this one before in the chain rule.
这在链式法则里面看到过。
See, it is nothing but the good-old chain rule.
这就是所谓的“链式法则”
Then by chain rule, dpA/dp dpA/dP. Constant temperature.
考虑链式法则，还应该再乘以恒定的温度下的。
Our derivation of the chain rule contains one flaw.
我们推导链式法则的过程中有一个漏洞。
Well, we can answer that. The chain rule is something like this.
可以用链式法则来回答这个问题。
Well, of course we know the answer because that's a special case of the chain rule.
我们当然知道答案了,因为这是链式法则的一个特例。
Well, we could use differentials, like we did here, but we can also keep using the chain rule.
我们可以用微分，就像这样，也可以用链式法则。
OK, this is only true for an ideal gas, and we went through that mathematically where the, with a chain rule.
这一关系只对理想气体成立，上节课我们，用链式法则推导出了这一关系。
Expect one about a min/max problem, something about Lagrange multipliers, something about the chain rule and something about constrained partial derivatives.
有一个极值问题，也有关于拉格朗日乘数法的，链式法则也会有的,约束条件下偏导数当然不会漏掉。
The formulas calculating higher derivatives of parametric functions and composite functions are given by the chain rule and the product formula for derivatives.
用函数的链式法则和乘积公式给出了参数函数和复合函数的高阶导数的计算公式。
OK, and we can find this one from the constraints as we've een at the beginning either by differentiating the constraint, or by using the chain rule on the constraint.
我们可以从限制条件中找到这个，我们一开始就看到的，要么用微分限制条件，要么利用链式法则。
That means all the packets not matching any rule in the INPUT chain will be dropped.
这意味着，将丢弃所有与input链中任何规则都不匹配的信息包。
But if the packet doesn't match a rule, then it is compared to the next rule in the chain.
但是，如果信息包与这条规则不匹配，那么它将与链中的下一条规则进行比较。
Next the packet's header information is compared with each rule in the chain it is passed on to, unless it perfectly matches a rule.
接下来，将信息包的头信息与它所传递到的链中的每条规则进行比较，看它是否与某条规则完全匹配。
Finally, if the packet doesn't match to any rule in the chain, then the kernel consults the policy of that chain to decide what to do with the packet.
最后，如果信息包与链中的任何规则都不匹配，那么内核将参考该链的策略来决定如何处理该信息包。
Each chain can have a policy that defines "a default target", i.e. a default action to perform, if a packet doesn't match any rule in that chain.
每个链都可以有一个策略，它定义“缺省目标”，也就是要执行的缺省操作，当信息包与链中的任何规则都不匹配时，执行此操作。
The second command simply deletes rule number 3 from the OUTPUT chain.
第二条命令只是从OUT put链删除编号为3的规则。
All packets that don't match any rule in the chain will then be forced to use the policy of the chain.
所有与链中任何规则都不匹配的信息包都将被强制使用此链的策略。
RETURN: The RETURN target set in a rule makes the packet matching that rule stop traversing through the chain containing the rule.
RETURN ：在规则中设置的 RETURN目标让与该规则匹配的信息包停止遍历包含该规则的链。
This example command appends a rule at the end of the INPUT chain that specifies packets coming from source address 205.168.0.1 to be ACCEPTed.
该示例命令将一条规则附加到input链的末尾，确定来自源地址205.168.0.1的信息包可以ACCEPT。
The first command deletes a rule from the INPUT chain that specifies packets destined for port 80 to be DROPped.
第一条命令从INPUT链删除规则，它指定 DROP前往端口 80 的信息包。
A or — append: This command appends a rule to the end of a chain.
a或——append：该命令将一条规则附加到链的末尾。
A or — append: This command appends a rule to the end of a chain.
a或——append：该命令将一条规则附加到链的末尾。
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