perigynous flower

用法例句

The paper reports the experiment of annual flower supply of Gladiolus.

本文报道唐菖蒲花期调节试验的结果，表明采用自然栽培、控制栽培及促成栽培等综合措施是实现唐菖蒲周年供花的有效途

The peri acid (Laurent' acid) was synthesized from nitronaphthalenesulfonic acid by mixed catalyst made by laboratory, and the novel green catalytic hydrogenation technology in the preparation of periacid was adopted.

在研究了现有生产硝基萘磺酸还原生产周位酸工艺的基础上,采用绿色新工艺,利用 自制的混合催化剂,对影响反应的各种因素进行了研究,并通过实验选定了优化工艺条件。