Harden is a verb that means to make or become hard or harder.
Harden是动词，可以指使硬化、使经得起考验或使轮廓鲜明。
| 单词 | harden |
|---|---|
| 音标 | [ˈhɑ:dn] [ˈhɑ:rdn] |
| 释义 | 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"] |
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