radiolarian chert

常見例句

雙語例句

• There exists abundant Radiolaria in the chert, and the radiolarian association suggests that the chert was formed in the last period of Late Jurassic.
  硅質(zhì)巖中含有大量放射蟲，放射蟲組合顯示硅質(zhì)巖的沉積時(shí)代為晚侏羅世晚期。
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