Tra từ richter scale - Từ điển Oxford Advanced Learner 8th

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.