n. 开始；初动；进入速率；起始速率
v. 开始（commence的ing形式）

Commence \Com*mence"\ (k[o^]m*m[e^]ns"), v. i. [imp. & p. p.
{Commenced} (k[o^]m*m[e^]nst"); p. pr. & vb. n.
{Commencing}.] [F. commencer, OF. comencier, fr. L. com- +
initiare to begin. See {Initiate}.]
1. To have a beginning or origin; to originate; to start; to
begin.

Here the anthem doth commence. --Shak.

His heaven commences ere the world be past.
--Goldsmith.

2. To begin to be, or to act as. [Archaic]

We commence judges ourselves. --Coleridge.

3. To take a degree at a university. [Eng.]

I question whether the formality of commencing was
used in that age. --Fuller.