跟踪: follow the tracks of; tail after; following; follow-up tracing; track; tracking; trail; lock-on; shadow sb.: 雪地跟踪 follow sb.'s tracks in the snow; 跟踪嫌疑犯 tail after a suspect; 跟踪敌舰 shadow t
地球: the earth; the globe◇地球扁率 compression [flattening] of the earth; 地球扁球体 earth spheroid; 地球变化磁场 variable magnetic field of the earth; 地球表面 earth surface; 地球波导 terrestrial waveguide; 地球测绘电子学
