单词	did down
释义	did down v. 做自上而下的动作
随便看	excitation level excitation light source excitation limit excitation limiting relay excitation loss excitation-loss relay excitation matrix excitation mechanism excitation method excitation monochromator excitation monochrometer excitation motor-generator set excitation need excitation number excitation of a gas excitation of cavity mode excitation of crystal excitation of direct current generator excitation of muscle excitation of oscillation excitation of spectra excitation of turbulence excitation of vibration excitation parity excitation pattern 15132534 1513534 1515 151525114 151534 151534344 15155 152111134 1521112 152111254 46499 46500 46501 46502 46503 46504 46505 46506 46507 46508