The attenuation weak spot is the black strip in the lower left corner of the band.
天线的衰减弱点就是钢圈左下角的黑色覆盖物。
The target echo of passive radar based on FM signal has the characteristics of low SCR and narrow band. Only the receiver with large dynamic range can receive the weak echo signal.
基于FM信号的无源雷达目标回波信号信杂比低，频带窄，只有开发大动态范围的接收机才有可能接收到微弱的目标散射信号。
When the shear line vapour band is weak, and the Plateau shear line will move southeastward.
切变线水汽带减弱时，高原切变线东南移。
The distortion is weak within the operation band.
在整个工作频带内方向图畸变较小。
The Raman spectra either did not show the diamond 1332 cm-1 peak or the peak was very weak, while the D-band and the graphite peak appeared clearly.
拉曼光谱要么不显示金刚石1332cm - 1峰，要么显示的峰很弱。但D带和石墨峰值却清晰可见。
The Raman spectra either did not show the diamond 1332 cm-1 peak or the peak was very weak, while the D-band and the graphite peak appeared clearly.
拉曼光谱要么不显示金刚石1332cm - 1峰，要么显示的峰很弱。但D带和石墨峰值却清晰可见。
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