trace tov.上溯;追溯到
tracen.痕迹;微量;踪迹v.追踪;描绘;找出根源
trace gas technique微量气体技术
traceability system可追溯系统
Trace determination痕量测定
trace to the source溯源
traceability design溯源性设计
trace concentration痕量浓度
trace inner product迹内积
trace to its source追本溯源
Traceback algorithm回溯算法
trace of resentment怨恨的意味