The technique of fabricating concave gratings in PMMA by double X-ray exposures is described.

介绍了一种通过微细加工技术即二次X射线曝光制作凹面光栅的方法。

youdao

A trademark used for a wide armless chair with leather cushions on a double X-shaped frame formed of gently curving stainless steel bars.

一种宽大而无扶手的椅子的商标名。该椅有双层X形框架，由细雕不锈钢条组成，上面铺有皮垫。

youdao

If you plan on testing a new X config file on the plane, update the double tap entry to restart your good X server.

如果计划在一个基础上测试新的X配置文件，可以将双击条目更改为重新启动配置好的X服务器。

youdao

And the mathematics of that equation involved a double derivative in time of x 0 plus some constant times x equals zero with some constraints on it.

那个数学方程式,包括了x对时间的二阶导数,加上常数乘以x等于,还有一些限制条件。

麻省理工公开课 - 固态化学导论课程节选

And now we get the p orbitals, remember we want to fill up 1 orbital at a time before we double up, so we'll put one in the 2 p x, then one in the 2 p z, and then one in the 2 p y.

我们到了p轨道，记住在双倍填充之前,我们想要每次填充至一个轨道，所以我们在2px填充一个然后2pz填充一个，然后2py填充一个。

麻省理工公开课 - 化学原理课程节选

With a confidence borne of years of Tabasco abuse, I've plumped for the double-X chilli, a mid-strength choice that is awarded a "beware" on the menu.

BBC: The perfect chilli con carne in the heart of Texas

His co-driver, Tracy, is a Guinness Book of World Record holder for completing the Hot Wheels Double Loop Dare at the 2012 X Games.

FORBES: Connect

My own estimate is that there are about 10, 000 white hat security researchers working full time to counter malware (100 vendors X 50 average and double that for independents.) I am still working on an estimate of the number arrayed on the other side of this battle ground.

FORBES: Battleground Cyberspace: Hackers vs. White Hats