South Africa was going through a period of irreversible change.南非正在经历一场不可逆转的变革。The decision is irreversible.这一决定不能取消.She had been in what doctors described as an irreversible vegetative state for five years.她处于医生所说的不可逆性植...
碳化植物残余通常是丰富的.Carbonized plant remains are commonly abundant.它是阳光与大气中的碳化氢和氧化氮作用的结果.It is the result of sunlight reacting with hydrocarbons and nitrogen oxides in the atmosphere.叙述了PI原丝的碳化和石墨化过程.The carbonization and the g...