| 单词 | infrequent |
| 例句 | infrequent adjective •her infrequent visits:rare, uncommon, unusual, exceptional, few (and far between), as rare/scarce as hen's teeth | unaccustomed, unwonted | isolated, scarce, scattered | sporadic, irregular, intermittent, seldom | informal once in a blue moon. ANT common. |
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