资料来源 : pyDict

起初,首先,一开头

资料来源 : Webster's Revised Unabridged Dictionary (1913)

First \First\, adv.
   Before any other person or thing in time, space, rank, etc.;
   -- much used in composition with adjectives and participles.

         Adam was first formed, then Eve.         --1 Tim. ii.
                                                  13.

   {At first}, {At the first}, at the beginning or origin.

   {First or last}, at one time or another; at the beginning or
      end.

            And all are fools and lovers first or last.
                                                  --Dryden.

资料来源 : WordNet®

at first
     adv : at the beginning; "at first he didn't notice anything
           strange" [syn: {initially}, {ab initio}, {at the start}]