阻止倒塌的水泥板掉下来
collapse
noun
an instance of a structure falling down or in
倒塌;塌陷
the collapse of a railway bridge.
一座铁路桥梁的倒塌。
concrete
noun
[mass noun]a heavy, rough building material made from a mixture of broken stone or gravel, sand, cement, and water, which can be spread or poured into moulds and forms a stone-like mass on hardening
混凝土
slabs of concrete.
混凝土板。
[as modifier]concrete blocks.
混凝土块。
sheet
a broad flat piece of material such as metal or glass
薄板;薄片
the small pipe has been formed from a flat sheet of bronze.
这根小管子是由扁平薄铜片做的。
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