noun🔗Share回扫 The period when the beam of the cathode-ray tube returns to its initial horizontal position in order to start the next line of the display."During the oscilloscope's retrace, the bright line disappears briefly before beginning the next scan. "示波器在回扫期间，亮线会短暂消失，然后开始下一次扫描。electronicstechnologycomputingsignaldevicemachinephysicsChat with AIVocabulary GamePractice Reading
verb🔗Share重描, 重新描绘 To trace (a line, etc. in drawing) again."To prepare for the art test, she retraced the outline of the flower on the paper. "为了准备美术考试，她在纸上重描了花的轮廓。actionartwayChat with AIVocabulary GamePractice Reading
verb🔗Share折回，原路返回 To go back over something, usually in an attempt of rediscovery."He retraced his steps, and found his keys where he had dropped them."他折回原路，结果在掉落的地方找到了钥匙。actionwayhistoryplaceChat with AIVocabulary GamePractice Reading
