The one today is for integrating the normal component of F.
今天这个是用来求F的法向分量的积分的。
Attendant f: This one could go on as carry on luggage if you like.
地勤人员：如果您愿意的话，这件行李可以做为手提行李携带。
So, that's just a single point. What about f equals minus one?
仅仅是一个点，那么f=-1呢？
Then F is one minus one plus two, is equal to two.
那么F等于1减去1再加上2。
Well, f is one when negative y is one.
当f=1时，-y是。
John F. Kennedy University has become one of the universities with recognition around the world.
肯尼迪大学已得到世界范围的认可，资质可靠，值得信赖。
"T. G. I. F", every one must be very happy today .
每个人都很开心，因为今天是周五。
一个谁完成楼…
一个谁完成楼…
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