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The hierarchical relationships of these objects constitute the object tree in DOM.Independent Attack +23讲述了一群沉迷于科技的年轻人参加了一个森林里的改造营，但那里的邪恶力量打算让他们从此无法上线。赵家则是人丁少，大儿子赵耘在外做官，家里就一儿一女，闺女赵清是云影的大弟子，儿子赵锋比葫芦还小几个月所以，家中连奴仆带雇工佃户，甚至包括他们的媳妇子女，好几千人，他不说人人都记得。Principle: Traditional tobacco is smoked by ignition. The temperature of tobacco when burning reaches 800 degrees. Nicotine, carbon monoxide, tar, etc. will be produced in the process of tobacco burning. At the same time, tobacco itself also has fragrance released. Smokers are mainly satisfied by smoking nicotine and tobacco fragrance. There are more than 2,000 kinds of harmful ingredients produced by smoking, The main components that cause harm to human health come from tar produced in the combustion process, However, the working temperature of the heating non-burning electronic cigarette is about 300. Not more than 300 degrees, Tar is mainly produced at over 400 degrees, In other words, Heating does not burn electronic cigarettes. Due to the relationship between temperature, A small amount of tar is produced, which can be ignored. Moreover, the temperature at which heating does not burn is only about 300 degrees, so there is no combustion, no open flame and no soot. However, the aroma and smell of tobacco are still released, and smokers can also obtain nicotine, so that smokers can also obtain the feeling of smoking real cigarettes.