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21. | make known or cause to appear with great speed. |
| 使知晓或使快速出现。 |
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22. | an unidentifed species; an unidentified witness. |
| 未经确认的物种;未经确认的证词。 |
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23. | not by design or artifice; unforced and impromptu. |
| 未经设计或计划;自然的、未经准备。 |
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24. | be released or become known; of news. |
| 被发布或被知晓;消息。 |
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25. | an unconfirmed letter of credit; unconfirmed rumors. |
| 未经证实的信用卡;未经证实的谣传。 |
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26. | they were acquainted; fully acquainted with the facts. |
| 他们很熟;完全知晓这些事实。 |
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27. | make familiar or acquainted with. |
| 使熟悉或知晓某件事情。 |
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28. | not knowledgeable about something specified. |
| 对特定的事物不知晓。 |
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29. | kept from public knowledge by various means;. |
| 用各种手段不让公众知晓。 |
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30. | not openly acknowledged. |
| 没有公开的让人知晓。 |
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