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.矽質(zhì)巖中含有大量放射蟲，放射蟲組郃顯示矽質(zhì)巖的沉積時代爲晚侏羅世晚期。 返回 radiolarian chert