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。
At Echo Wall, visitors now offer cries instead of sacrifices, hoping to hear their voices bounce back to them.
我们一周前就发信给他们了，但迄今未收到回音。
We wrote to them a week ago but have not received a reply as yet.
我三星期前给他们写了封信，至今未见回音。
I wrote to them three weeks ago, and I haven't had an acknowledgment yet.
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