The cell lost its autotrophic character and became dependent on added chemical energy sources . 细胞丧失了自养的特性，变成依赖于外加的化学能源生活。
2.
The reclamation and recycle of polystyrene foamed plastic waste not only can control pollution but also solve the problems of chemical energy sources 摘要将废弃的聚苯乙烯泡沫塑料回收利用既可解决它所带来的污染，又可缓解化工能源不足问题。
