| 1. | The first emperor of qin unified china in 221 b.c .
秦始皇于公元前221年统一中国。 |
| 2. | In 221 bc ， in shanxi province there was a poor scholar
公元前221年，山西有一位穷书生。 |
| 3. | Kang said the double - spring phenomenon had only occurred 12 times since 221 b . c
康说，双春现象自西元前221年起只发生过12次。 |
| 4. | During the warring states period ( 475 ? 221 b . c . ) , china was divided into seven fiefdoms
在中国历史上的战国时期（公元前475 ?前221年） ，中国被划分为七个诸侯国。 |
| 5. | In 221 b . c . , qin unified china , at that time ; the national minorities of the southwest side were called southwest yi
前221年，秦统一中国，当时，西南边疆的少数民族被称为“西南夷” 。 |
| 6. | Artefacts unearthed from the archaeological sites on the island can be traced back to the bronze age ( 1500 - 221 bc )
岛上考古遗址出土的器物，可上溯至青铜器时代(公元前1500至公元前221年) 。 |
| 7. | Later , another type of coin was used , with holes in it , and these were used for the next 2000 years , that is , from 221 bc until 1916
后来使用另外一种中间有孔的硬币，这种硬币以后用了2000年，即从公元前221年开始到1916年为止。 |
| 8. | When qin shihuang or the first emperor unified china in 221 bc ， he decided to have the various sectio of the walls linked up and also extended . from that we got the great wall
秦始皇于公元前221年统一中国后，决定把这些不同的城墙连起来并加长，于是我们便有了长城。 |
| 9. | When qin shihuang or the first emperor unified china in 221 bc ， he decided to have the various sections of the walls linked up and also extended . from that we got the great wall
秦始皇于公元前221年统一中国后，决定把这些不同的城墙连起来并加长，于是我们便有了长城。 |
