The former includes X-ray, CT, MRI and ultra-sound imaging.
结构性成像包括：X射线成像，CT，磁共振成像，超声成像。
2
The scientists determined theduration of the X-ray flashes by modifying a process originally developed tomeasure ultra-short flashes of light.
【译】科学家们借鉴了一种最初被用来测量超短闪光的方法，进而确定了X射线光的持续性。
3
X-ray diffraction indicates that the prepared films are AlN films. The field emission characteristics of the AlN films were measured in an ultra-high vacuum system.