hollow structure短语¹⁴⁴⁹⁷²⁺² 基本例句 中空结构 Porous starch, a new type of modified starch with hollow structure, can be produced by ways of ultrasonic irradiation, spraying, mechanical impact, alcohol denaturalization or acid hydrolysis. 多孔淀粉是一种中空变性淀粉，有超声波照射、喷雾、机械撞击、醇变性和酸水解等多种生产方法。 chemyq