PиxLy
иxLyұgl(f)չ
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(ָ) ĻεķQs}`ɵ
2(ָ)OӋضɵ
3(ָ)eIJõ,
furnace n. ۠t
һ(run by steam) ^Z~printing pressesע@run^Z~Ǻfound@
ģͨ^\
(by hand)~Zprinting pressesעrather thanlZ֮ǰҲ^ˣһ~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
ģұgl(f)չdz
(developing ingenious furnaces) ,^Z~
ģl(f)չ˪ضɵ۠t
ģ(to produce the high heat neededfor production),^Z~
ģɮaұFҪĸߜ
壺(to control the amount of air) ,^Z~
ģƿ՚Ĕ(sh)
( that reached the carbon and ironore) ľ䣬air
ģ|̼FV
ߣ(necessary for making iron. ) ~Zair
ģұFбҪ
ɣAfricanshad iron from a relatively early date
g
ұgl(f)չdzޓF^磬l(f)չ˪ضɵ۠tɮaұFҪĸߜҿƽ|̼FVĿ՚ԝMұFҪ
Сcu
@ӵҪɷ־Ƿ^Z~~ZԼľ҄ձÿһɷʲôܿ@ӵĽY
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