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21. | time of the year during which most fashionable social events are held |
| 社交繁忙时期 |
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22. | heavy [traffic condition] |
| 繁忙〔交通情况〕 |
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23. | unreasonably busy |
| 不合理地繁忙 |
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24. | route busy hour |
| 路径繁忙时间 |
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25. | alive with boats |
| 船只来往繁忙 |
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26. | heavy traffic |
| 繁忙的交通 |
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27. | His official duties kept him busy. |
| 他公务繁忙。 |
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28. | The traffic's not very heavy. |
| 交通不很繁忙。 |
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29. | critical peak period |
| 最繁忙时间 |
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30. | a busy day. |
| 繁忙的一天。 |
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