| 单词 | 回火 |
| 释义 | 〔backfire〕An explosion of prematurely ignited fuel or of unburned exhaust gases in an internal-combustion engine.回火：过早点燃的燃料的爆炸或内燃机中未燃的废气的爆炸〔tempered〕a sword of tempered steel.回火的铁制成的剑〔roulette〕A small, toothed disk of tempered steel attached to a handle and used to make rows of dots, slits, or perforations, as in engraving or on a sheet of postage stamps.滚轮：一种与把手相连的回火钢带齿小轮或小盘用以滚压成行状的圆点、切口或孔眼，如蚀刻画中的压花或一整版邮票上的孔眼〔temper〕The condition of being tempered.回火：回过火的状态〔temper〕The degree of hardness and elasticity of a metal, chiefly steel, achieved by tempering.韧度：通过回火后的金属（主要指铁）的硬度和韧度〔temper〕To harden or strengthen (metal or glass) by application of heat or by heating and cooling.回火：通过加热或热冷交替来增加（金属或玻璃）的强度和硬度〔tempered〕Made appropriately hard or flexible by tempering:钢淬过火的：制作艰难的或因回火而有弹性的：〔ausform〕To subject (especially steel) to deformation, quenching, and tempering to improve its wear properties.奥氏形变法炼钢：使（尤指钢）在经受形变后淬火和回火以增加抗磨损性 |
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