求翻译：而黄土路基的不均匀沉降和工后沉降是目前是目前高速公路建设、养护和新城市建设中所面临的棘手问题，也是工程和理论上急待解决的问题。是什么意思？

Loess subgrade settlement uneven settlement and work is now facing the thorny issue of the current highway construction, maintenance and new urban construction, engineering and theoretically pressing problem.

false

But after the loess roadbed differential settlement and the labor the subsidence is at present is the delicate matter which in the present highway construction, the maintenance and the new urban construction face, also is the project and the theoretically pending issue.

Differential settlement of subgrade in loess and post-construction settlement is by far is the new town construction, highway construction, conservation and the thorny issues facing, as well as engineering and pressing problem in theory.