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| 31. | The sunshine duration is long, the temperature difference is big, the frost-free period is long, and |
| 日照时间长，昼夜温差大，无霜期长，年太阳能辐射量大，对农作物生长十分有利。 |
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| 32. | For example, if a man takes an extended series of deep breaths or holds his breath for too long a duration |
| 比如，如果一个人进行一连串的深呼吸或者长时间憋住气，脑干就会接管呼吸系统，使我们不至于把自己憋死。 |
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| 33. | The results showed that Yanyou 361 maintains a long green leaf duration, low c hlorophyll declining speed |
| 结果表明，烟优361生育后期绿叶面积持续时间长，叶绿素分解缓慢，细胞膜结构相对稳定，抗旱性强。 |
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| 34. | The duration of this appointment is too long. |
| 该约会的持续时间过长。请确认每个约会的持续时间短于重复约会间的间歇时间。例如，如果约会出现在每个星期二，则约会的持续时间必须短于一个星期。 |
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