sign an undertaking是什么意思？

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• brat
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• 领域英语
• giraffe
• neck
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• 权限英文
• algiers
• toxicity
• sweater
• prompt
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• committing
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• dragon
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• text
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• 来源英语
• searches

• eleoeharis tuberosa
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• hydrochloride
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• mucilaginous hair
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• The Balloonatic
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• Into the hive
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• stamp out
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• very bright
• female and male
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• go underwater
• show loving care for
• nicking tool
• Haare
• drive a car