infinitesimal

adj. /ˌɪn.fɪ.nəˈtes.ə.məl/ C2

极微小的；微不足道的

Extremely small, almost impossible to measure.

仙境例句

To the Mock Turtle, the difference between Tortoise and taught us was infinitesimal.

在假海龟听来，“Tortoise”和“taught us”之间的差别极其微小。