back echo

基本解释

You can also use the back decorative echo wedding season theme.
你还可以用椅背装饰呼应婚礼的季节主题。
Such surfaces reflect most of the bats’ echolocation energy away from it, but some energy hits the surface perpendicularly, sending an echo back directly beneath the bat.
这样的平面反射了大部分蝙蝠的声波，但是有一部分能量垂直撞击到表面上，声波回传至蝙蝠。
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。

This I whispered,and an echo murmured back the word, "Lenore!"Merely this,and nothing more."
This I whispered, and an echo murmured back the word,"Lenore!"

But his healing hands soon also became indispensable to the Tsarina Alexandra who needed him to calm her nerves, cure her headaches, soothe her rages and echo back her own desires in the guise of the word of God.
ECONOMIST: Ra-Ra-Rasputin
Back in Washington, defence officials echo that line.
ECONOMIST: Punching through to Baghdad