ever since a long time ago
long-spanned and long-unit continuous girder bridge
(2+1)-dimensional dispersive long wave equation
(2+1)-dimensional dispersive long wave system with variable coefficient
1000 km long green corridor
1000 m long great diameter borehole
12-year Long-term Science and Technology Developme
2+1 dimensional dispersive long wave system
2+1D dispersive long-wave equation
2+1-dimensional dispersive long wave equation
2+1-dimensional dispersive long wave equations
2+1-dimensional dispersive long-wave equation