The X stood for “eXtreme” and web developers were required to cross their arms in an X shape when speaking the letter.

其中，X表示“eXtreme”（极端）。 当时的Web开发人员在提到这个字母的时候，必须双臂交叉，作出一个X的形状来。

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Now, just to repeat, again I know I've got some math phobics in the audience, let me just slow down a second, all I'm doing here is I'm saying look at this equation of the pink line, look at this equation of the blue line, X is when they cross, i.e., they are equal to each other.

我再重复一遍,我知道你们之中有些人数学不怎么好,我放慢一点说,我是这么解的,看这条粉线的方程,还有这条蓝线的方程,X是二者的交点,也就是说这点两个方程相等

耶鲁公开课 - 博弈论课程节选

The large wheels also create the necessary space for installing the BRABUS high-performance brake system with 12-piston aluminum fixed calipers and 380 x 36-mm (15.0 x 1.42 inches) vented and cross-drilled discs in front, and 355 x 28-mm (14.0 x 1.1 inches) discs and six-piston aluminum fixed calipers on the rear axle.

ENGADGET: Brabus iBusiness luxury sedan puts an iPad at every seat, a Magic Mouse at every hide-covered armrest

Tesla is also moving closer to finalizing its production facilities in Fremont, Califronia, where it will mass produce its Model S and its coming Model X, a cross over.

FORBES: Tesla More Than Doubles Revenue But Drops On Earnings Miss

From the new Shin Megami Tensei X Fire Emblem cross-over, to the announcement of two new Zelda games (well, one new one and an HD remake of Wind Waker) the Nintendo goodies just keep dropping.

FORBES: Connect