Kē / xué / jiā / tōng / guò / yán / jiū / Gēng / xīn / shì / de / huà / shí / lái / liǎo / jiě / gǔ / dài / qì / hòu科学家通过研究更新世的化石来了解古代气候。Scientists study Pleistocene fossils to learn about ancient climates.