用苹果手机录音取证，结果第一次收听到的声音下次再听没有了。录音时长15小时？ 在线翻译：中文翻译成英文
\u7ffb\u8bd1##########China is the world's largest coal production and consumption Country\uff0cand is also one of the few countries which regard coal as the main sources of energy ,the coal energy rates was very high among energy consumption structure rates in our country.Among them, most of the coal combustion for power generation and heating industry.For large coal-fired power station and boiler,Pulverized coal combustion is the main way of combustion.However, It's one of the most important factors which has restricted the sustainable development that the use of pulverized coal combustion efficiency is not high and the environmental pollution caused by burning of our country one of the most important factors.
Based on the coal combustion efficiency and low pollution comprehensive consideration," corona charged pulverized coal combustion mechanism and experiment research" is put forward.By means of high voltage electrostatic field on the solid particles and gas can produce electric charge effect,On one hand, the gas atoms or ions moving kinetic energy is very high,and when contact with the pulverized coal particles,it'll transferred part of energy to the coal particle surface, and lead to Particles in an unstable high-energy state , increased the particle surface activity; On the other hand, oxygen, carbon monoxide, corona methane gas ion, electron, has high energy, those make accelerate coal particle combustion reaction rate, reduce combustion reaction temperature become possible. However, in the actual production process of coal, coal is usually in a flow state. From theoretic analysis, the flow of pulverized coal combustion efficiency of pulverized coal is greater than under the static state, Therefore,the pulverized coal flow in charge of combustion enhancement is possible.
In this paper,on the basis of pulverized coal particles are charged successfully, through using of the original cyclone electrostatic charge system to build the pulverized coal flow injection charge combustion system. using a photographic record and analysis of its ignition and combustion state, using sampling thermal analysis method of burnout to exploring Charged pulverized coal flow combustion status.
Key words: corona discharge, the pulverized coal flow, combustion, thermal analysis
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由于苹果对隐私保护的看重，iPhone很早就禁止了通话录音功能，下面列举三种使用苹果手机通话录音的方法：
1、使用appstore的录音软件，支持苹果手机边打电话边录音，很多软件以免费试用为幌子乱扣费，大家要留意，正规的主流录音软件包括：移动公证、电话录音—移动通话录音专家、加密电话；
2、打开通话免提，使用录音笔对通话过程进行录音。这个方法简单易用，麻烦的就是需要先掏钱买个录音笔，然后还要随身携带；
3、手机越狱后，你想干什么都可以，更别说通话录音功能了，但是这个方法风险有点高，玩意手机出故障，苹果官方是不保修的。
以上三种方法，各有利弊，希望对你有所帮助，望采纳！
在最近删除里面找找，可能手误删了。如果没有，看看有没有iCloud备份，再没有就很难找到了。但是偷偷录音的音频好像是不可以当作证据的，如果您是要处理严肃的事情多咨询专业的人。
可以用苹果手机商店的取证专家录音取证试试，或者多用一台机子录音取证，多途径确保录音能顺利保存下来。
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