See, if you took the derivative of this with respect to x you will get 2xy and this guy will go away x because there is no x in it.

如果你对它关于x求导,就会得到2xy，而这项就没有了,因为它里面没有。

youdao

Even if I was that guy in the X-Men or the Matrix or whatever it was, who could reason his way into making people do things.

就算我是X-Men或者尼奥,我能影响到别人的推理

耶鲁公开课 - 博弈论课程节选

If a guy died in X-COm I just reloaded a save from a turn or two back.

FORBES: Connect

Aside from its tough-guy credentials, there's a 1280 x 800 screen, five megapixel camera, Tegra 2 dual-core 1GHz processor, WiMAX connection and the staple WiFi, Bluetooth, and GPS medley.

ENGADGET: ASUS TOUGH 7-inch Honeycomb tablet lands in Japan ready for some corporate abuse

The subscription service offers instant access to current and past seasons of shows like 30 Rock, Modern Family, The X-Files, Arrested Development and Family Guy.

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