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And then we let the ball develop into a fully grown inner ear.
接下来，我们让泡囊发育成一个成熟的内耳。
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$firstVoiceSent
- 来自原声例句
And then we let the ball develop into a fully grown inner ear.
接下来，我们让泡囊发育成一个成熟的内耳。
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