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Từ điển Oxford Advanced Learner 8th
ultrasound
ultra·sound [ultrasound] BrE [ˈʌltrəsaʊnd] NAmE [ˈʌltrəsaʊnd] noun
1. uncountable sound that is higher than humans can hear
2. uncountable, countable a medical process that produces an image of what is inside your body
•Ultrasound showed she was expecting twins.
•an ultrasound scan
•ultrasound scanning
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