Experimental, or unofficial MIME types are denoted with a subtype that starts with, "x -".

还在试验当中或者非官方的MIME类型在二级分类开头会加一个“ x - ”。

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Methods The pig experimental models of pulmonary embolism and infarction were examined by X ray, ventilation perfusion scanning, helical CT, angiography.

方法以小型猪为肺栓塞、肺梗死实验动物模型，进行X线平片、核素灌注扫描、螺旋CT、血管造影检查。

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Some experimental results are consistent with the results obtained by optical methods, however, X-ray method has its special advantage in discriminating the properties of dislocations.

实验结果与光学方法所得结果相一致，但在判明位错的性质方面，X射线形貌术有其独特的优点。

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The Edison2 is an experimental car that was one of the winners of the ten-million-dollar Progressive Insurance Automotive X Prize.

VOA: special.2010.11.17

But the story began in the nineteen forties with the X series of experimental aircraft.

VOA: special.2010.07.07

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

Under the terms of the agreement, Japan will modify an existing F-16 design to produce by the late 1990s a new aircraft, designated the FS-X (Fighter Support Experimental).

CENTERFORSECURITYPOLICY: The US-Japan FS-X Fighter Agreement: Assessing The Stakes

In the wake of his results Roche have begun testing an old class of experimental anxiety drugs called mGluR5 inhibitors in fragile X patients.

FORBES: The Man Behind Biotech's Bold Push For Autism Drugs