As yet, study on trace elements is concentrated on such areas as enrichment, distribution and transformation principle, as well as sampling devices and control techniques.

• 目前有关燃烧中痕量元素的研究主要集中在其富集分布规律、大气中的迁移以及控制技术和取样装置等方面,较少深入到反应机理这个层次上。