单词	邱念圈
释义	邱念圈von Thünen rings
随便看	dual type switch board dual-use line dual valuation dual valuation clause dual valuation {= d/v} dual valve dual variable dual variables dual vector dual vector space dual vision dual voltage dc system dual-voltage fed dual-voltage motor dual voltage motor vehicle dual voltage operation dual voltage supply dual water cooled generator dual-wavelength dual wavelength doppler radar dual wavelength interrogation dual wavelength lasers dual-wavelength led dual wavelength operation dual wavelength photodetector