### Chinese: 他说，与之相比，在上一波的德尔塔疫情中，他治疗的新冠患者“呼吸困难，血氧水平低。
### English: In contrast, he said, during the last Delta outbreak, patients he treated with COVID-19 “had difficulty breathing and low blood oxygen levels.”

### Improved English: He said that, in comparison, the COVID-19 patients he treated in the last round of epidemic suffered from “breathing difficulties and low blood oxygen.
