adv.运转着，生效...

A contraflow system is in operation on this section of the motorway.这段高速公路的一侧正在实行双向行驶。Until the rail links are in operation, passengers can only travel through the tunnel by coach.在铁路连线开通之前，乘客只能乘坐长途客车穿越隧道。Part of the new...

in operation的音标：in operation的英式发音音标为：[in ˌɔpə'reiʃən]in operation的美式发音音标为：[ɪn ˌɑpə'reʃən]...