| 可 | ke3 | can |
| 证明 | zheng4 ming2 | proof |
| 说明 | shuo1 ming2 | caption |
| 著 | zhu4 zhu4 zhuo2 | book |
| 改善 | gai3 shan4 | to improve |
| 肯定 | ken3 ding4 | definite |
| 进步 | jin4 bu4 | to improve |
| 同意 | tong2 yi4 | to agree |
| 改进 | gai3 jin4 | to improve |
| 批准 | pi1 zhun3 | to confirm |
| 向上 | xiang4 shang4 | to advance |
| 完善 | wan2 shan4 | to improve |
| 改良 | gai3 liang2 | improved |