Around all this sits the steel and concrete of the secondary containment structure.

所有上述结构又被包裹在一个钢筋混凝土结构中——二级安全壳。

youdao

Unlike an LU, a Fragment does not necessarily define a logical containment structure or a namespace.

与逻辑单元所不同的是，一个片断并不是必须定义一个逻辑容器结构或者一个名称空间。

youdao

The containment structure is a hermetically (air tight) sealed, very thick structure made of steel and concrete.

它是高度密封，用钢铁和混凝土制成的非常厚的壁障。

youdao

In fact, unlike Fukushima, Chernobyl had no containment structure whatsoever to limit the spread of radioactivity.

FORBES: An Immodest Proposal to Spur Nuclear Energy Industry Growth -- and Global Safety

They have a primary and a secondary containment structure, both made from thick reinforced concrete, to protect against the release of radioactive materials.

FORBES: Explainer: What Caused The Incident At Fukushima-Daiichi

In a reactor, the containment structure may melt.

FORBES: Housing's Positive Feedback Loop and the Coming Meltdown