名词
中文翻译：正式练习
同义词：
['formal training', 'formal activity']
例句：
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1.We need to do some formal exercises every day to keep fit.
我们需要每天做一些正式的锻炼来保持健康。
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2. The teacher gave us a formal exercise on how to write an essay.
老师给我们做了一个关于如何写论文的正式练习。
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3. During the holiday, we often engage in formal exercises like reading and writing.
假期里，我们经常进行阅读和写作的正式练习。