by word of mouth idiom
口头上的
in speech but not in writing
All the orders were given by word of mouth so that no written evidence could be discovered later. 所有命令都是口头传达的，所以事后找不到任何书面证据。
| 单词 | by word of mouth |
| 释义 | by word of mouth idiom 口头上的 in speech but not in writing All the orders were given by word of mouth so that no written evidence could be discovered later. 所有命令都是口头传达的，所以事后找不到任何书面证据。 |
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