无穷小的英文怎么说

无穷小的英文：
infinitesimality

A millionth of an inch is an infinitesimal length.
一英寸的百万分之一是极小的长度。

The body's annual intake of metallic iron is infinitesimal.
人体对金属铁的年摄入量是微不足道的。

Newton says he has abandoned the infinitesimal or infinitely small quantity.
牛顿说他已放弃了微元或无穷小量。

She spoke with that gentle infinitesimal inflexion of mockery which descended to her from her mother.
她说话时，带着她母亲传给她的那种温柔细致的嘲笑语调。

She spoke with that gentle infinitesimal inflexion of mockery which descended to her from her mother.
她说话时，带着她母亲传给她的那种温柔细致的嘲笑语调。