a. 微小的

[ adj ]
small and remote and insignificant
<adj.all>
a jerkwater collegepassed a series of poky little one-horse towns

jerkwater \jerkwater\ adj. [from jerk + water, a place where it
is necessary to draw (jerk) water to supply the boiler of a
steam engine.]
1. small and remote and insignificant; as, a jerkwater
college.

Syn: one-horse, pokey, poky.
[WordNet 1.5]

2. (Railroads) Off the main railroad line. [Archaic]
[PJC]