The shearing strength at the foundation, where the concrete is placed on a smooth rock surface, may be lessened . 当混凝土浇筑在平滑的岩石表面时，地基上的剪切强度可能会减少。
How frightful to hurl the remaining manhood of france against this wall of fire and concrete ! 如果将剩下的法国壮丁，派去攻打这座由炮火和混凝土合成的铜墙铁壁，这是多么可怕啊！
The conference was to be held in the underground bunker, a cold, damp, airless shelter lined with concrete . 会议将在一个用混凝土衬砌的地下掩体里举行，那里阴暗湿冷而且空气稀薄。
In general, concrete or damp earth would represent a fair compromise for neutron, as well as for gamma-ray, shielding . 一般说，混凝土或湿土是护防中子和射线的相当满意的防护体。
My three-year old son watched closely as i battered at a concrete slab in our back yard with a heavy sledge-hammer . 我在后院用重的大锤敲打一块混凝土板时，我3岁的儿子聚精会神地在旁边看。
The other is that of utilizing the thickness of the concrete as an efficient biological shield against nuclear radiation . 另一种是利用混凝土的厚度，作为防止核辐射的一个有效的生物保护罩。
They would certainly be less pleasing to the eye and often more expensive than the prestressed concrete beam . 与预应力混凝土梁比较，它们自然更显得外貌粗拙，不甚美观，而且成本也往往更高一些。
According to their building material, dams are described as concrete, earth fill, rock fill, hydraulic fill and so on . 按照筑坝所用材料，可以把坝称为混凝土坝、填土坝、堆石坝，水力冲填坝等等。
