词汇	board track
释义	board track 木板跑道
随便看	System of digital seismograph system of diophantine equation system of diophantine equations system of direct election system of discipline system of disincentives System of Dispute Resolution system of distinct representation system of distinct representative system of distinct representatives system of distinct representativessdr system of distribution system of dividing taxes system of division of powers system of division of responsibility system of dormitory management system of dose limitation system of dossier transfer in pretrial System of Drainage Area Geomorphology system of drilling system of drilling fluids system of dual leadership system of early-warning systems system of earth science system of eco-environment