Before pipelines can be built, developers must acquire rights of way along miles of private and public lands.在敷设管道前，开发商们必须先取得横贯公私土地许多英里的管道用地。The Channel Tunnel was an excellent public-private partnership.海峡隧道是公私合作的杰出项目。He wound up his business and personal affairs before joining the army.他把公私事务料理妥帖后才去参军。