对目标航线的监视trace: n. (马车等的)挽绳,挽车的皮带;【机械工程】连动杆; ...monitor: n. 1.告诫物,提醒物;〔古语〕忠告者;劝告[告诫、警 ...a trace: a扫迹; a扫描轨迹; 踪迹a-trace: 扫描线no trace: 无线索下载手机词典可随时随地查词查翻译