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.
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.
当控制临近结束偏差较小时，采用无波纹最小拍控制，实现限时精定位，从而达到快速、精确定位的目的。
The precise control near the end of control where minor deviations are observed is realized by ripple—free minimum beat control to bring about a rapid, fine timing effect.
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