2. The name of cocaine [gǔkēJiǒn]. Cocaine. White crystalline powder extracted from coca leaves. It can constrict blood vessels and can be used as a local anesthetic.

The quaint [gǔpì] is still weird.

4. The geological history of Paleozoic [gǔshēngdài] began about 570 million years ago to 250 million years ago. The duration is about 320 million years. It is divided into six periods: Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian. The strata formed in this period are called Paleozoic. Invertebrates are the most important biota. During this period, marine strata were mainly distributed in China. Many coal-bearing strata were formed in the middle and late period.

5. The bodies found [gǔshī] The bodies of the ancients have been preserved since ancient times. The bodies of the ancients have been preserved since ancient times.