这辆车回火了。
她又去把那些鸡放回火里，给它们涂上黄油，愉快地转动着铁叉。
She went and put the fowls down again to the fire, basted them, and drove the spit merrily round.
日本铸剑师们开始采用更细更简单的回火纹。
Japanese swordsmiths started to adopt thinner and simpler temper lines.
他们管这叫硫化或电镀或者是回火之类。
三种。它们是淬火、回火和退火。
三种。它们是淬火、回火和退火。
三个过程：它们是淬火、回火和退火。
它由防锈的回火钢制成，具有缎光表面。
It is made of rustproof tempering steel with a satin-finish surface.
钢是通过加热再放进冷水里回火炼成的。
Steel is tempered by heating it and then putting it into cold water.
旧卡车突然出现回火，声音像放爆竹一般。
EXAMPLE: The old truck made a sudden backfire which sounded like a firecracker.
印尼村民返回火山斜坡。
热处理包括正火、正火和回火或者淬火和回火。
Heat treatment shall consist of normalizing normalizing and tempering or quenching and tempering.
在回火过程中，不但要考虑温度而且要考虑时间。
In the process of tempering, some consideration should be given to time as well as to temperature.
建立了回火硬度与回火温度关系的回火效应模型。
The tempering behavior model of relationship between tempering hardness and temperature was set up.
经过回火之后，钢的强度增大，因为其晶粒变细了。
After having been tempered, the steel becomes stronger because its grains get finer.
钢的热处理工序包括硬化、回火、退火和表面硬化。
The procedures of heat treatment of steel include hardening tempering annealing and case hardening.
钢的热处理操作主要有三种，即：淬火，回火和退火。
There are three main operations in the heat treatment of steel: hardening, tempering and annealing.
钢的热处理操作主要有三种，即：淬火、回火和退火。
There are three main operations in the heat treatment of steel: hardening tempering and annealing.
回火作业可以描述为渗碳体析出和凝聚或聚结的过程。
The tempering operation may be described as one of precipitation and agglomeration or coalescence of cementite.
应该把它磨得很锋利，不要回火锻造，免得它会断裂。
减少残余奥氏体和马氏体碳化物的降水预计的回火工艺。
Retained austenite reduction and carbide precipitations in the martensite are anticipated by the tempering process.
回火完全淬硬钢得到的最终组织结构被称为回火马氏体。
The final structure obtained from tempering a fully hardened steel is called tempered martensite.
二次回火后硬度变化不大，三次回火后，硬度反而降低。
Two times temper has little effect on the hardness, three times temper will decrease the hardness.
如果发动机回火，进气歧管骤增的压力就迫使阀门向后移动。
If the engine backfires, the sudden pressure in the intake manifold forces the valve back.
每次外面有汽车回火爆响，我都要好说歹说才能把他们从沙发底下哄出来。
Whenever a car backfires, I have to coax them out from under the couch.
每次外面有汽车回火爆响，我都要好说歹说才能把他们从沙发底下哄出来。
Whenever a car backfires, I have to coax them out from under the couch.
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