occurrence index

• 火灾发生率

occurrence index的用法和样例：

例句

1. Somatropin has not been shown to increase the occurrence of scoliosis.
   生长激素并未显示出提高脊柱侧凸的发生率。
2. In addition, patients with acute PE seem to have a higher cancer occurrence than those with other mild VTE presentations.
   此外，对照于比较轻微的全身静脉血栓栓塞症，在急性肺栓塞的病人似乎具有比较高的癌症发生率。