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Từ điển Oxford Advanced Learner 8th
Richter scale
the Rich·ter scale BrE [ˈrɪktə skeɪl] NAmE [ˈrɪktər skeɪl] noun singular
a system for measuring how strong an ↑earthquake is
•an earthquake measuring 7.3 on the Richter scale
Word Origin:
[Richter scale] 1930s: named after Charles F. Richter (1900–85), American geologist.
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