名词
中文翻译：备用时间
同义词：
['free time', 'downtime', 'idle time']
例句：
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1. We need to make good use of our spare turns during the holiday.
我们需要在假期里好好利用我们的空闲时间。
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2. The teacher gave us some spare turns to finish the project on time.
老师给了我们一些空闲时间来按时完成这个项目。
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3. During his spare turns, he often reads books and studies.
在他空闲的时候，他经常读书和学习。