| 单词 | trace the source |
| 释义 | trace the source Encryption technology makes it almost impossible to trace the source. The Sun The agency would also have to trace the source of pollution. Times,Sunday Times Coastguards were never able to trace the source of the spill. Times, Sunday Times And doctors have unable to trace the source of the vomiting muscle fatigue that seen him miss the cut five of his last six starts. The Sun Fresh panic erupted after baffled officials failed to trace the source of a suspected chemical leak a fortnight ago. The Sun |
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