track down什么意思解释？

track down的音标：track down的英式发音音标为：[træk daun]track down的美式发音音标为：[træk daʊn]...

He was determined to track down the cause of food spoilage.他决心查出食品腐烂的原因.Car manufacturers stamp a vehicle identification number at several places on new cars to help track down stolen vehicles.汽车制造商在新车的好几处地方打上车辆识别号码，以便于追...