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21. | return an echo |
| 响起一声回音 |
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22. | whispering gallery |
| 回音廊 |
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23. | backscattering strength |
| 回音分散强度 |
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24. | We now await your early reply with interest. |
| 恭候回音。 |
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25. | The child did not answer. |
| 没有回音。 |
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26. | Bring us word again. |
| 带回音来。 |
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27. | I am awaiting your reply. |
| 鹄候回音。 |
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28. | But there was no reply. |
| 但是没有回音。 |
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29. | A building may reflect sounds. |
| 建筑物可回音。 |
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30. | If this idiotic letter doesn't prod a response, I'll really get depressed.I'm waiting to hear from you |
| 静候回音! |
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