求翻译：路基面应设计成三角形，由中心线向两侧设4%横向排水坡。曲线加宽时，路基面仍保持三角形。区间曲线地段路基面外侧加宽值见表8-2。是什么意思？

Subgrade surface should be designed into a triangle, located on both sides from the centerline to 4% lateral drainage slope. Curve widening, the subgrade surface remains triangle. Lateral range curve widening subgrade surface values ​​shown in Table 8-2.

In this regard, it should be designed as a roadbed 3 triangle, the center line on either side to horizontal drainage slope located 4 per cent. curve-oriented broad-banded mountainsides, still maintain 3 triangle. Roadbed curves interval lots outside-oriented value towered side see table 8 -2.

The subgrade should design the triangle, supposes 4% crosswise weathering by the central alignment both sides.When widening on curve, the subgrade still maintained the triangle.The sector curve land sector subgrade outside widening value sees Table 8-2.

Subgrade surface should be designed into a triangle, from center line to set up 4% horizontal drainage slopes on both sides. Curve when widening, roadbed remains triangular. Widening value interval lateral subgrade in curve as shown in table 8-2.

Should be designed into the triangle the road bed, set up 4% horizontal water drainage slopes on both sides from centre line to two. When the curve is widened, still keep the triangle the road bed. Outside widen value show in 8-2 Table block curvilinear location road bed.