When I put the irondown on the table, the telephone rang again!
当我把熨斗放在桌上时,电话又响了!
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Gravity causes the core to collapse, making the core temperature rise to nearly 18 billion degrees F (10 billion degrees c), breaking the irondown into neutrons and neutrinos.
The explanation may be in Earth's mantle, the layer of rock underlying the tectonic plates and extending down over 1,800 miles to the outer edge of Earth's iron core.