单语范例（未经PONS编辑处理）
英语
- No laws of physics are broken when a spatial frequency band beyond the cut-off spatial frequency is swapped for one inside it: this has long been implemented in dark-field microscopy.en.wikipedia.org
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英语
- dark-coloured
- Dark Continent
- dark current
- darken
- darkened
- dark-field microscopy
- dark glasses
- dark horse
- darkie
- darkish
- darkly