production operation

• 生产活动

production operation的用法和样例：

例句

1. None of this knowledge can be acquired apart from activity in production.
   离开了生产活动就不可能获得任何这种知识。
2. No unit or individual without appointment shall engage in production activities of ephedrine.
   未经指定的任何单位和个人，不得从事麻黄素的生产活动。