A signal is simply any physical quantity whose magnitude and variation with time (or occasionally some other variable) contain information.
信号是任意自然物理量随其规模和时间(或其他一些随机变量)的变化而包含的信息。
Based on variation of refractive index, ARROW sensors are high sensitive to physical and chemical quantity and interaction of bio-molecule.
基于折射率的变化，抗共振反射传感器对物理量、化学量和生物分子间的相互作用有很高的敏感性。
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