但由于四车道公路隧道的建设在国内尚处于起步阶段，有许多问题亟待研究。
This paper focuses on characteristics and progress in research of four lane road tunnel. Some key technological problems to be studied are pointed out.
我突然发现下面的一条小路，于是司机猛踩刹车，在一条新修的四车道高速公路中间停下来，我们去查看的时候，车就被扔在那。
When I spotted one of these down a side turning, the driver slammed on his brakes in the middle of a newly built four-lane highway, and simply abandoned his car while we got out to investigate.
结构由几个钢筋混凝土波浪状拱构成，支撑起一条四车道的公路。
The structure comprises several arching waves of reinforced concrete, which support a four-lane highway.
应用推荐