Methods of distinguishing the first order diffraction spectrum from other order one have been described in detail by observing half- widths, locations and intensities of the spectrum.
提出了用峰位、半峰宽和峰高和滤光法来鉴别各级光谱的方法。
2
Location: two and one-half finger widths above the center of the wrist crease on the outside of the forearm midway between the two bones (ulna and radius).
地点：两个和一个半半径指宽以上尺骨骨中心的两个手腕折痕前臂外的中途岛之间。
3
Two and one-half finger widths above the center of the wrist crease on the outside of the forearm midway between the two bones (ulna and radius).