But that distant echo was the only response produced by Neb's shouts, while a heavy gloom hung over all the part east of the island.
可是回答纳布呼唤的只是遥远的回声，而小岛整个的东部却是一片昏暗。
The rumble of distant thunder seemed to echo my inner turmoil.
远处轰鸣的雷声似乎在呼应我内心的混乱。
In ideal circumstances, the back scattered echo signal of SAR is chirp signal. With synthetic aperture theory, high azimuth resolution imaging to distant targets can be attained.
理想情况下，SAR回波多普勒信号是线性调频信号，采用合成孔径原理提高方位向成像分辨率。
In ideal circumstances, the back scattered echo signal of SAR is chirp signal. With synthetic aperture theory, high azimuth resolution imaging to distant targets can be attained.
理想情况下，SAR回波多普勒信号是线性调频信号，采用合成孔径原理提高方位向成像分辨率。
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