kē / xué / jiā / zài / hǎi / dǐ / chén / jī / wù / zhōng / fā / xiàn / le / dà / liàng / fàng / shè / chóng / huà / shí

科学家在海底沉积物中发现了大量放射虫化石。

Scientists found many radiolarian fossils in the seafloor sediment.