名词
中文翻译：无条件反射
同义词：
['innate reflex', 'involuntary reflex']
例句：
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1.The dog's unconditioned reflex to bark at strangers is quite impressive.
狗对陌生人的无条件吠叫反射令人印象深刻。
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2. The child's involuntary reflex to run when he hears the doorbell is adorable.
孩子听到门铃响时不由自主跑起来的反射很可爱。
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3. The scientist discovered that the animal's unconditioned reflex to avoid predators was due to genetic factors.
科学家发现，动物避免捕食者的无条件反射是由遗传因素导致的。