kē xué jiā zài kǎo gǔ fā jué zhōng fā xiàn le bǎo cún wán hǎo de yīng wǔ luó huà shí

科学家在考古发掘中发现了保存完好的鹦鹉螺化石。

Scientists discovered well-preserved ammonite fossils during archaeological excavations.