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  1. harden

    • IPA[ˈhärdn]

    美式

    • v.
      make or become hard or harder;make or become more severe and less sympathetic
    • verb: harden, 3rd person present: hardens, gerund or present participle: hardening, past tense: hardened, past participle: hardened

    • 釋義
    • 相關詞
    • 片語

    動詞

    • adj.
      having become or been made hard or harder: hardened steel

    Oxford Dictionary

    • adj.
      having become or been made hard or harder: hardened steel

    Oxford American Dictionary

    • v.
      harden the surface of (a material): the blades are case-hardened with reinforced backing plates

    Oxford Dictionary

    • v.
      harden the surface of (a material): the blades are case-hardened with reinforced backing plates

    Oxford American Dictionary

    • v.
      toughen (a metal) as a result of cold-working: the hammering has work-hardened the metal inside and out the rest of the strength is generated by work-hardening

    Oxford Dictionary

    • ph.
      acclimatize a plant to cold conditions by gradually increasing its exposure

    Oxford Dictionary

    • ph.
      acclimatize a plant to cold conditions by gradually increasing its exposure

    Oxford American Dictionary

    • v.
      toughen (a metal) as a result of cold-working: the hammering has work-hardened the metal inside and out the rest of the strength is generated by work-hardening

    Oxford American Dictionary

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    片語

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    • IPA[ˈhɑːd(ə)n]

    英式

    • v.
      make or become hard or harder: wait for the glue to harden brick is made of moist clay hardened by heat

    Oxford Dictionary