fragransCOCA²²⁰⁵⁹³BNC¹⁰⁴⁵⁸⁴⁺⁶ 基本例句 桂花原型fragran的复数 Objective To research the impact of formaldehyde air pollution on fractal characteristics of Osmanthus Fragrans leaves and the application of fractal theory in formaldehyde air pollution monitoring. 目的探讨甲醛空气污染对桂花叶片分形特征的影响以及分形理论在甲醛空气污染监测中的应用。 dictall