释义 |
index fossil ˈindeksˈfɔsl 基本英英近义反义Thesaurus 标准化石
Noun: a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found近义词 guide fossil标准化石 as in.trace fossil 同义词 fossil footprint,fossil record,zone fossil trace fossilnoun details in rock fossil footprint,fossil record,zone fossil |