它们的触角和外壳帮助他们探测和保护自身安全。
Their antennae and shells help them to detect and protect the security of themselves.
他们的触须和外壳帮助他们探测和保护自身安全。
反应堆由一个钢与混凝土构成的厚实外壳(第一层安全壳)保护着，另外还配有一个蓄水库，防止反应堆过热。
The reactor vessel is surrounded by a thick steel-and-concrete primary containment vessel, equipped with a water reservoir designed to suppress overheating of the vessel.
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