Lignin is a characteristic component of secondary walls.
木质素是次生壁成份的特征。
The characteristic component Beisisu in artificial Cow-Bezoar was identified by simple and specific TLC method.
采用薄层色谱法鉴别人工牛黄特征成分贝斯素，方法简单、专属性强。
Based on local signal to noise ratio, the method estimates characteristic component of speech sound sub band covered by noise.
一种根据局部信噪比，估计受噪声掩蔽的语音子带特征分量的方法。
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