crushed rock

基本解释

Crushed rock layers are distributed widely in periglacial environment.
碎石层在冰缘地区有广泛分布。
Macadam type bases involving successive layers of crushed rock bound with rock dust were also used.
人们曾经使用“石结”基层——几层由石粉黏结在一起连续的碎石层。
An analysis carried out by the probe, which landed on May 25th, suggests the local regolith (the crushed rock that passes for soil on Mars) is slightly alkaline—which such vegetables prefer.
在5月25日着陆的探测器完成了一项分析，分析表明表层土壤（在火星上，被压碎的岩石被称为土壤）略呈碱性，而这些碱性土壤正适合上述的那些植物生长。

It is made from a blend of crushed rock, rubber and polyurethane, a synthetic plastic that replaces bitumen as the binding agent and allows even bigger pores in the road surface.
ECONOMIST: Quieter traffic: When the rubber hits the road The
Right now, I believe I would lie down for him in any bog or mucky hole or feel my spine crushed against any roadside rock, should he require an upright encounter.
NEWYORKER: Amundsen