实现了阶跃输入时的实际转速对给定转速的跟踪，而且稳态时无偏差。

The actual rotary speed during the stage jump input period could trace the given rotary speed and there was no error during the stabilized period.

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为获得无偏差的哮喘控制分析结果，评价哮喘对于初级保健的影响，基层医生对于哮喘患者进行了哮喘控制问卷调查。

In order to obtain an unbiased assessment of asthma control and assess its impact in primary care, primary care physicians used a 1-page control questionnaire in 50 consecutive asthma patients.

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击弦机：高精度、严格的设计无偏差的击弦机保证了钢琴的灵敏度，经久耐用。采用100%纯羊毛红木榔头具有最佳的弹性，使音色优美细腻动听。

Action: High precision action guarantees the sensitivity and durability while 100% pure woolen red wooden hammer ensures best springiness and delicate sound.

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