Zhuan first

120 first aid

1NF first normal form

a first aid course

a first class discipline

A level of first order

a thousand-li journey begins with the first step

absolute first curvature

Act Governing Replacement of Any Vacant Seat of the First Term National Assembly

action of the first impression

adaptive depth first search

adult of the first form

age at first calving

age at first insemination

age of first mating

age of producing first egg

Age of the first spermatorrhea

amplitude of first harmonic

Ancient Characters of First Tone

Annually first rainy period in the south of China