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      иxLy

      rg2021-01-09 18:52:54 иԇ ҪͶ

      PиxLy

      иxLyұglչ

      PиxLy

      Unlike in the Americas, where metallurgy was a very late and limited development, Africans had iron from a relatively early date, developing ingenious furnaces to produce the high heat needed for production and to control the amount of air that reached the carbon and iron ore necessary for making iron. (50)

      ~R

      metallurgy n. ұ (g,W)

      ingenious  adj.

      1(ָ) Ļ򺆆εķQs}ģ`ɵ

      2(ָ)OӋضɵ

      3(ָ)eIJõ,

      furnace  n. ۠t

      һ(run by steam) ^Z~printing pressesע@run^Z~Ǻfound@׻

      ģͨ^\

      (by hand)~Zprinting pressesעrather thanlZ֮ǰҲ^һ~ǡ

      ģͨ^

      (to produce a thousand pages in anhour rather than thirty.) ^Zitָ@`

      ģaһǧһСrȶҪʮСr

      ɣoperators found it possible

      g

      һ(Unlike in the Americas),~Z

      ģ

      (where metallurgy was a very late and limited development) ,ľ

      ģұglչdz

      (developing ingenious furnaces) ,^Z~

      ģlչ˪ضɵ۠t

      ģ(to produce the high heat neededfor production),^Z~

      ģɮaұFҪĸߜ

      壺(to control the amount of air) ,^Z~

      ģƿ՚Ĕ

      ( that reached the carbon and ironore) ľair

      ģ|̼FV

      ߣ(necessary for making iron. ) ~Zair

      ģұFбҪ

      ɣAfricanshad iron from a relatively early date

      g

      ұglչdzޣޓF^lչ˪ضɵ۠tɮaұFҪĸߜҿƽ|̼FVĿ՚ԝMұFҪ

      Сcu

      @ӵҪɷ־Ƿ^Z~~ZԼľ҄ձÿһɷʲôܿ@ӵĽY

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