| 词组 |
be on firm ground |
| 释义 |
●be on firm ˈgroundbe sure about your beliefs, knowledge, etc.; be confident (对自己的信念、知识等)有信心◆I don’t know a lot about physics, I’m afraid. I’m on firmer ground with mathematics, which I studied at university. 我恐怕对物理知道得不多,但是对数学我比较有自信,我在大学学过。 |

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