| 短语 | sb's trail / scent is cold |
| 释义 | sb's trail / scent is cold used to say that you cannot find someone because it has been too long since they passed or lived in a particular place某人已经踪迹全无:•I tracked the boy as far as the factory, but there his trail went cold.我追踪那名男孩一直到工厂，但他已踪影全无。 |
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