As a necessary element of animal, fluorine has very important function in production.
氟作为动物体中一种必需的微量元素，在生产上有很重要的作用。
In every stages of cognition, where there is experience, theory has very important active function.
在认识的任何一个环节中，只要有经验出现的地方，理论都发挥着重要的作用。
In every stages of cognition, where there is experience, theory has very important active function.
在认识的任何一个环节中，只要有经验出现的地方，理论都发挥着重要的作用。
应用推荐