The reactor is encased in concrete and steel.

核反应堆由钢筋混凝土围住。

《牛津词典》

There are skyscrapers constructed out of concrete, steel and glass all over the city.

整个城市充满了混凝土、钢筋和玻璃修建的摩天大厦。

youdao

To concrete shear walls, they add steel braces to a skyscraper's skeleton or beefier rebar.

为了用混凝土覆盖剪力墙，他们把钢托支撑加到摩天大楼的骨架或是大钢筋上。

youdao

Workers also used more than twenty million kilograms of steel to strengthen the concrete in the dam.

VOA: special.2009.08.12

Costs for coal are highly dependent on the cost of gasoline, and the costs for wind are highly dependent on material costs like steel and concrete as wind requires about 10 times the amount of steel, concrete and copper per kWhr than any other energy source.

FORBES: The Naked Cost of Energy -- Stripping Away Financing and Subsidies

Nearly half the GDP is spent on capital improvements (usually things that involve concrete and steel).

FORBES: Money Creation Betrays Fed Insanity

They still bar building material such as concrete, steel and pipes, as well as industrial equipment.

ECONOMIST: The Gaza Strip