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because they fly in to land on our medical center, a few times a day usually.
因为它们飞进来在我们的医学中心上降落，一天通常会有好几次。
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$firstVoiceSent
- 来自原声例句
because they fly in to land on our medical center, a few times a day usually.
因为它们飞进来在我们的医学中心上降落，一天通常会有好几次。
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