英语
德语
sub·stra·tum [sʌbˈstrɑ:təm, 美 -ˈstreɪt̬-] 名词
1. substratum 地质 (deep layer):
- substratum
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德语
英语
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单语范例（未经PONS编辑处理）
Spores of many species have special appendages which facilitate attachment to the substratum.
en.wikipedia.org The activities of mangrove fauna in the intertidal mudflats develop micromorphological features that trap and hold sediments to create a substratum for mangrove seeds.
en.wikipedia.org If carried out on cells attached to a substratum, the cap forms at the rear of the moving cell.
en.wikipedia.org Around 300 words are considered by many linguists to be of substratum origin.
en.wikipedia.org Below the subsoil is the substratum, which can be residual bedrock, sediments, or aeolian deposits.
en.wikipedia.org