trace tov.上溯;追溯到
tracen.痕迹;微量;踪迹v.追踪;描绘;找出根源
trace of Philistinism庸人习气
trace transgenic rice痕量及微量转基因大米
trace characteristics痕迹特征
traceability recovery可跟踪性链
trace-through state跟踪过程状态
trace element anomaly微量元素异常
trace oxygen analyzer微量氧分析仪
trace a river upwards溯流而上
Trace amounts of lead痕量铅
trace of intoxication喝醉了的样子