ad. 恰好地
适当地

[ adv ]
at an opportune time
<adv.all>
he arrived rather opportunely just when we needed a new butler

Opportune \Op`por*tune"\, a. [F. opporiun, L. opportunus, lit.,
at or before the port; ob (see {Ob-}) + a derivative of
portus port, harbor. See {Port} harbor.]
Convenient; ready; hence, seasonable; timely. --Milton.

This is most opportune to our need. --Shak.
※ -- {Op`por*tune"ly}, adv. --
{Op`por*tune"ness}, n.