Syringa x hyacinthiflora is a cross between Syringa oblata and S. vulgaris.

紫丁香是扁形紫丁香和普通紫丁香的杂交品种。

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"Look at this," he said, pointing to the faint "X" s. "All of them identical."

“看看这个，”他说，指着一个模糊的十字“它们都一样。”

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Designed as a scalable, multi-mission radar system, AMDR is comprised of an X-band, S-band and radar Suite Controller (RSC).

AMDR的设计为一个可扩展多任务雷达系统，是由一个X波段、S波段和雷达套件控制器(RSC)组成的。

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"One of the really frustrating things for patients with fibromyalgia is that there's nothing to measure in labs or in X-rays.

VOA: special.2011.08.02

px So we're talking about pi carbon 2 p x, 2px because it's the x axes combining to carbon 2 p x.

我们讨论的是π碳，因为它在x轴结合成碳。

麻省理工公开课 - 化学原理课程节选

X So now if we actually introduce the variable X, welcome X. Let's do this again.

现在如果我们引进一个变量，欢迎你，X，让我们再做一次。

哈佛公开课 - 计算机科学课程节选

Similarly, while Apple's OS X's user interface is not just easy to use but engaging, it's just a candy shell built around the kind of tried-and-true Unix software that's powered everything from phone networks to computer science labs for a generation.

FORBES: Apple's Greatest Innovations

The two phones are about equally thick, too, but the Atrix's edges are squared where the One X's are tapered and curved inward.

ENGADGET: Motorola Atrix HD review Mobile

They were followed by two more new entries, Will Young's Switch It On in at number five and Liberty X's A Night to Remember in at six.

BBC: NEWS | Entertainment | Madonna in chart double success