The nature is composed of concrete material and abstract material.

自然界是由实物质与虚物质两种物质组成。

youdao

And even in condition of tiny deformation, the concrete material is not perfect elastic but nonlinear.

即使在微小变形条件下，砼材料也具有非线性性质，不是理想的弹性材料。

youdao

Based on the fractal characteristic of concrete material, the relation between fracture toughness and height of crack zone is analyzed.

根据混凝土材料裂纹的分形特性，分析了混凝土的断裂韧度与裂纹带高度之间的变化关系。

youdao

Kahn was able to make the concrete material of the building look both solid and airy.

VOA: special.2009.12.13

Men in two special factories worked day and night to make the concrete building material for the dam.

VOA: special.2009.08.12

On June sixth,nineteen thirty-three, workers poured the first load of a building material called concrete.

VOA: special.2009.08.12

The mine was shut down by the U.S. Mine Safety and Health Administration due to the unsafe buildup of sand and concrete material in the main shaft of the mine.

FORBES: Hecla's Lucky Friday Mine Rehabilitation Slightly Ahead Of Schedule, Restart In Early 2013

No production from the mine is expected this year after the federal Mine Safety and Health Administration ordered the Silver Shaft to be closed for removal of built-up sand and concrete material.

FORBES: Hecla Officials Anticipate Clean-Up Of Mine Shaft Can Begin In Few Weeks

The temporary closure of the Silver Shaft at the Lucky Friday mine was ordered last year by the federal Mine Safety and Health Administration for removal of built-up sand and concrete material.

FORBES: Update:Hecla Plans To Reopen Lucky Friday Mine In 1Q; Loss Reported In 3Q