求翻译：每格中的基质采用砾石或卵石，颗粒由下而上递减基质厚度取0.6~0.8m.底层厚0.2m,粒径40~60mm,为粗砾石层；中层厚0。3m,粒径20~40mm，为中砾石层；上层厚0.15m,粒径10~30mm,为细碎石层。是什么意思？

Each cell in the matrix using gravel or pebbles, particles from the bottom up decreasing substrate thicknesses 0.6 ~ 0.8m. Bottom thickness 0.2m, diameter 40 ~ 60mm, for the coarse gravel layer; in thickness 0. 3m, diameter 20 40mm, medium gravel; on the thickness of 0.15m, diameter 10 ~ 30mm, for t

In each of the substrate using gravel or pebbles, bottom-up claw particle substrate thickness from 0.6 to 0.8 m, 0.2 m thick bottom . 40 ~ 60 mm diameter, a rough gravel; middle thick layer 0. Particle size at 3 m, 20 to 40 mm for the gravel layer; the upper level, 0.15 m thick, particle size 10 ~ 3

In each standard matrix uses the broken stone or the pebbles, the pellet decreases progressively matrix thickness to take 0.6~0.8m. from bootom to top first floor thick 0.2m, particle size 40~60mm, for coarse gravel level; Intermediate deck thick 0.3m, particle size 20~40mm, is the gravel bed; Upper

Each matrix in gravel or pebbles, descending on the particles from the bottom substrate thickness taking 0.6~0.8M. bottom thick 0.2m, size 40~60mm, rough gravel; Middle thickness 0. 3M, size 20~40mm, gravel; upper deck thick 0.15m, size 10~30mm, fine gravel layer.

Each matrix in gravel or pebbles, descending on the particles from the bottom substrate thickness taking 0.6~0.8M. bottom thick 0.2m, size 40~60mm, rough gravel; Middle thickness 0. 3M, size 20~40mm, gravel; upper deck thick 0.15m, size 10~30mm, fine gravel layer.