Occurrance of cancer的用法和樣例：
例句
- Substantial evidence shows that inflammation promotes oncogenesis and, occasionally, participates in cancer rejection.
充實的證據表明炎症能夠促進腫瘤發生，偶爾也會參與癌症排斥。 - The imbalance between neutrophil elastase and neutrophil elastase inhibitor may be the cancer possible mechanisms of development.
粒細胞彈性蛋白酶及其拮抗劑失衡是導致腫瘤發生的重要原因。
