形容词

1. 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。

1. 无限小的,无穷小的：infinite 无限的,无穷的 | infinitesimal 无限小的,无穷小的 | infinity 无穷大,无限,无限距

2. 无限小;无穷小：infinitely many 无穷多 | infinitesimal 无限小;无穷小 | infinity 无限(大无穷(大)

1. 极微小的;微不足道的
Something that is infinitesimal is extremely small.

e.g. ...mineral substances present in infinitesimal amounts in the soil...
土壤含有的极微量的矿物质
e.g. There was an infinitesimal pause.
其中有一个极短暂的停顿。

noun

1. (mathematics) a variable that has zero as its limit