在零件加工或机器装配过程中最后自然形成(间接获得)的环。 在零件加工或机器装配过程中最后自然形成(间接获得)的环。一个尺寸链只有一个封闭环。
由于农业发展不是处于一个封闭环境中,因此它和人体医学有所不同。
Agriculture differs from the medical science of the human body in that its environment is not a contained one.
不要浪费时间,马上开始全封闭环境英语口语。
Don't waste time. Start total immersion in English right away.
只有在将鸟类关在封闭环境的地方,这一控制方案才具有可行性。
This control option is feasible only where birds are kept in closed housing conditions.
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