harden词根词缀

harden

[ˈhɑːdn]

vt.使硬化;使经得起考验;使无情;使轮廓鲜明;

vi.变硬或更硬;变稳定;变习惯;

过去式： hardened 过去分词： hardened 现在分词：hardening 第三人称单数： hardens

例句:

1、

They harden clay by putting it in a fire.

他们把粘土坯放在炉火里使其变硬.

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2、

To quench steel is that hot steel is quenched to harden it.

淬钢就是烧热的钢置入水中骤冷使之坚硬.

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3、

The soft concrete will harden till it is like stone.

水泥将变硬直到像石头一样.

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