A photographic technique in which X-rays are used that may reveal internal detail (e.g. of a fossil) which is not visible externally. The technique has the advantage that it is non-destructive.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。