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| 业余时间 | |||
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| 工作时间以外的时间 | |||
| 工作以外的时间 | |||
| 休息时间; 业余时间; 非高峰时间 | |||
| off -hour: 4 phrases in 4 subjects |
| Architecture | 1 |
| Ecology | 1 |
| Refrigeration | 1 |
| Technology | 1 |
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