核心-所有核心物质是16毫米A级中密度纤维板。
通过扰动率，科学家们就能够修正对火星的大小和核心物质的估算。
From the wobbling rate, scientists were able to refine their estimates of the size and composition of Mars's core.
在切尔诺贝利，爆炸是因为压力过高，氢气爆炸，所有的容器爆裂，把熔融的(反应堆)核心物质撒向了环境中(一个“脏弹”)。
In Chernobyl the explosion was caused by excessive pressure buildup hydrogen explosion and rupture of all containments propelling molten core material into the environment (a "dirty bomb").
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