Say that f, our vector field is actually the gradient of some function.
也就是向量场f实际上是一个函数的梯度。
Say that I give you a formula for f.
假如我给你一个关于f的式子。
Why is that? Well, let's say that f sub x is zero.
为什么呢？我们令fx为。
When can I have your firms. I. F. prices, that is to say, the final offer, Mr. London?
伦敦先生，什么时分能给我你们公司确认的到岸价格，那就是，最后的报价？
When can I have your firm C. I. F. prices, that is to say, the final offer, Mr. London?
伦敦先生，什么时候能给我你们公司确认的到岸价格，那就是，非常后的报价？
When can I have your firm C. I. F. prices, that is to say, the final offer, Mr. London?
伦敦先生，什么时候能给我你们公司确认的到岸价格，那就是，非常后的报价？
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