Sentence Composition
| 1 | 空間科學 | kōngjiānkēxué |
|
| =2 | 還 | Huán | surname Huan |
| =2 | 還 | hái |
|
| =2 | 還 | huán |
|
| =2 | 還 | xuán |
| 3 | 在 | zài |
|
| 4 | 起步 | qǐbù |
|
| 5 | 階段 | jiēduàn |
classifier: 個 |