基本解释[地球科学]放射虫燧石英汉例句双语例句There exists abundant Radiolaria in the chert, and the radiolarian association suggests that the chert was formed in the last period of Late Jurassic.硅质岩中含有大量放射虫，放射虫组合显示硅质岩的沉积时代为晚侏罗世晚期。radiolarian chert更多例句词组短语短语radiolarian bedded chert 放射虫硅质岩radiolarian chert更多词组专业释义地球科学放射虫燧石