### Chinese: 申俊飞说，比如癌症早期检查时，医生如果不能及时看清所有肿瘤组织，那么之后癌细胞还会扩散。
### English: For example, if the doctor cannot see all the tumor tissues in time during the early examination of cancer, the cancer cells will spread later, Shen said.
### Errors: There is no error in the English translation.

### Improved English: According to Shen Junfei, for example, in early inspection of cancer, if doctors cannot see clearly all the tumor tissues in a timely manner, the tumor cells will still spread.
