... 底面回波 bottom echo 由被检件底面反射回来的波。同义词：背面回波 back reflection；back-wall echo 参考回波 control echo ...
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At Echo Wall, visitors now offer cries instead of sacrifices, hoping to hear their voices bounce back to them.
在回音壁前，游客们不再献祭，而是大声喊叫，希望能听见自己的回声。
Everyone knows that if he shouts in the vicinity of a wall or a mountainside, an echo will come back.
大家都知道，假如一个人在墙壁附近或是山腰里大声呼喊，就会产生一个回音。
Everyone knows that if he shouts in the vicinity of a wall or a mountainside, an echo will come back.
大家都知道，在墙壁或山腰附近发出的喊声，就会听到回声。
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