trac·ing 
(trāsĭng)
(trāsĭng)n.
1. A reproduction made by superimposing a transparent sheet and copying the lines of the original on it.
2. A graphic record made by a recording instrument, such as a cardiograph or seismograph.
| 单词 | tracing |
| 释义 | trac·ing (trāsĭng)n. 1. A reproduction made by superimposing a transparent sheet and copying the lines of the original on it. 2. A graphic record made by a recording instrument, such as a cardiograph or seismograph. |
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