Radiographic errors of dental bisecting technique .

牙科角分线放射技术的影像误差分析。

Conclusion both periapical films in bisecting angle technique and in distant paralleling technique can reflect the real teeth length precisely in premolar area .

结论前磨牙区的分角投照根尖片和平行投照根尖片均能精确反映牙齿的实际长度。

Seoul , south korea for half a century , a dark tunnel of crumbling concrete encased some five kilometers of a placid stream bisecting this bustling city .

将这个熙来攘往的都市一分为二的这条宁静河流，半个世纪以来，约有5公里被包覆在一条破烂、黑暗的水泥孔道中。

In 1989 , when preparations began for successful excavations , city leaders thought it would be enough to have two subway lines , totaling 20 miles , in an x shape bisecting a tightly packed downtown .

1989年，当一切准备都做好后，市领导认为修两条总长20英里x形的地铁足够联接市区了。