| 第一 | dì yī | first; number one; primary | |
| 第三产业 | dì sān chǎn yè | tertiary sector of industry | |
| 第三者 | dì sān zhě | sb who is romantically involved with sb already in a committed relationship; the other woman; the other man; third person; third party (in dispute); disinterested party; number three in a list | |
| 第三世界 | dì sān shì jiè | Third World | |
| 第一手 | dì yī shǒu | first-hand |
| 1 | This song ranks first. | |
| 2 | He unexpectedly got first place in the exam. | |
| 3 | We are competing for the first place. | |
| 4 | Skincare is the first step in beauty. | |
| 5 | The Yangtze River is the largest river in China. |
