Kite wires with a metal core are one of the troublemakers that haunt railway workers every year.

含金属丝的风筝线是每年都会困扰铁路工作者的一大麻烦。

Our home planet has a dense metal core, a thick viscous rock mantle, and a thin crust.

我们的这颗星球有稠密的金属核，粘稠的岩石地幔和薄薄的地壳。

What makes Psyche so special is that it appears to have been a planetesimal well on its way to becoming a planet, with a rocky exterior surrounding a metal core.

Psyche 之所以如此特别，是因为它似乎是一颗正在成为行星的微行星，其岩石外壳围绕着金属核心。