Yabla video uses of 农耕

农耕 nónggēng
时代 shídài
de
古人 gǔrén
通过 tōngguò
观察 guānchá
日月 rìyuè
de
周期性 zhōuqīxìng
变化 biànhuà
People from the ancient Agrarian age, by observing the cycle of the sun and moon,