名词
中文翻译：Unknown
同义词：
['monoplane', 'monoplane aircraft', 'monoplane model']
例句：
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1. The monoplane was designed to be lightweight and easy to fly.
这种单翼飞机设计轻便且易于飞行。
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2. The monoplane was used for military reconnaissance missions during World War II.
二战期间，单翼飞机被用于军事侦察任务。
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3. The monoplane was a popular choice for pilots who wanted to learn to fly in the air.
对于想要学习飞行的飞行员来说，单翼飞机是一个受欢迎的选择。