Pixe
[化] 质子激发X射线发射分析
🗣️ 情景例句
Charmed.
荣幸见到 。
Are there any questions?
还有什么问题吗？
Libraries made education possible, and education in its turn added to libraries: the growth of knowledge followed a kind of compound interest law, which was greatly enhanced by the invention of printing.
藏书使教育成为可能，而教育反过来又丰富了藏书，因为知识的增长遵循着一种“滚雪球”的规律。印刷术的发明又大大提高了知识增长的速度。