There they cool and harden into volcanic ash.

然后在空中它们又冷却变成火山灰。

youdao

Melted metal is poured into a mold to harden into shape.

熔化之金属倒入模子中以冷却成形。

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They can harden into a thick cyst, and can leave behind deep, hard-to-remove scars.

他们可以把一个厚厚的囊肿硬化，并能留下深刻的，难以去除的疤痕。

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The movement has caused the wealthy young white women, snobbish and scared, to harden into condescending racists.

NEWYORKER: The Help

But it is quite likely that the compromises reached under Mr Bremer's supervision may harden into permanence.

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Will she harden into a tough shell of a businesswoman who sees the world as a cold place?

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