The researchers analysed the sizes and structures of ash particles using a variety of techniques, such as atomic force microscopy, scanning electron microscopy and X-ray diffraction.

研究人员使用不同的技术研究了火山灰颗粒的尺寸和结构，例如原子力显微镜、电子扫描显微镜和X射线衍射。

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TV has even created sports categories. ESPN was the moving force behind the X Games, a showcase for competitions like street skating and snowmobile jumping.

电视创造了不同的电视节目，ESPN推出了表演如街上旱冰和雪上摩托车等运动的节目《X游戏》。

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The X-45N, however, emerged in response to a U.S. Air Force requirement, which dissolved last summer.

而X-45N，主要是根据美国空军要求设计制造，美国空军已于去年夏天终止了这一设计需求。

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Lieutenant Colonel Tom McIntyre, X-37B program manager for the Air Force Rapid Capabilities Office, explained the third X-37 flight will not only help the Air Force better evaluate and understand the vehicle's performance characteristics, but this first re-flight is an important step in the program.

ENGADGET: USAF relaunches its first X-37B on a slightly less mysterious spaceflight

Just this morning I turned on my car in the driveway (the car I lent to a 17-year-old African-born youth last night so he could drive with other African-born youths to a Korean take-out chicken place called Mo Betta Wings) and an X-rated hip-hop song blasted with such explosive force from the radio that, for a second, I thought I'd been in an accident.

CNN: I see America's diverse future--in my house

This appears to be the mindset of the Air Force regarding its experimental X-37B space plane, the billion-dollar robotic vehicle's orbital flight being extended beyond the 270 days it was initially designed for.

ENGADGET: Air Force X-37B space plane books additional time on orbital cruise, orders another margarita