chemical firm化学公司chemicaladj.化学的n.药品；化学物chemical forms of heavy metal重金属形态chemical communication system化学通讯系统chemical industry measurement化工检测chemical sedimentation method化学沉淀法chemical precipitation method化学沉淀法chemical transmitting synapse化学传递突触chemical conversion treatment化学转化处理chemical engineering industry化工chemical resolution technique化学拆分chemical effect of ultrasound超声化学效应

1. Cryoscopy is obtained by classical chemical methods.
   冰点是由经典的化学方法获得的。
2. The samples are pretreated by microchemical method.
   样品前处理采用了微量化学法。
3. Mechanical comminution and chemical methods were all used in China and India antiquity for making gold powder.
   古代中国和印度采用机械法和化学法制造金粉，其金粉技术和应用都有久远的历史，但也有若干差异。