这只无名的鸟，有时听任自己留在笼栅之内，对自己低语着无束缚的不可知的外界的音讯。
The unknown bird sometimes surrenders itself within the bars of the cage to whisper tidings of the bondless unknown beyond.
看看鸟儿，自由而无拘无束，不会被工作束缚，也不会被粗心的神照顾。
Look at the birds, free and unfettered, not tied down to a job description, careless in the care of God.
指出无模型控制器是一种结构自适应控制器，它是“建模与控制一体化”，冲破p、I、D和线性框架的束缚的产物。
The model free controller is a structure adaptive controller, which is a product of the approach of modeling and control unity and the concepts of PID and linear frame.
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