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

Improve \Im*prove"\, v. i.
   1. To grow better; to advance or make progress in what is
      desirable; to make or show improvement; as, to improve in
      health.

            We take care to improve in our frugality and
            diligence.                            --Atterbury.

   2. To advance or progress in bad qualities; to grow worse.
      ``Domitain improved in cruelty.'' --Milner.

   3. To increase; to be enhanced; to rise in value; as, the
      price of cotton improves.

   {To improve on} or {upon}, to make useful additions or
      amendments to, or changes in; to bring nearer to
      perfection; as, to improve on the mode of tillage.