| Simplified | Traditional | Pinyin | HSK Level | Frequency | Definition | Actions | Learning Status |
|---|---|---|---|---|---|---|---|
| 划时代 | 劃時代 | huà shí dài | 7 | 32601 | epoch-marking | View | |
| 学时 | 學時 | xué shí | 4 | 52820 | class hour, period | View | |
| 与时俱进 | 與時俱進 | yǔ shí jù jìn | 7 | 1000000 | abreast of modern developments, to keep up with the times, progressive, timely | View | |
| 那时候 | 那時候 | nà shí hou | 2 | 1000000 | at that time | View | |
| 时好时坏 | 時好時壞 | shí hǎo shí huài | 7 | 1000000 | sometimes good, sometimes bad | View |