脑膜炎球菌性脑膜炎在全世界以小型聚集方式出现，存在季节性变化，占流行性细菌性脑膜炎的比例并不固定。

Meningococcal meningitis occurs in small clusters throughout the world with seasonal variation and accounts for a variable proportion of epidemic bacterial meningitis.

youdao

为保证生产，BAULI公司雇用了大量季节性工人，最多时超过1200人，而BAULI的固定员工，也就在800人左右。

Instead, Bauli hires lots of seasonal workers to work on dedicated production lines: up to 1, 200 of them at peak times, more than its permanent staff of around 800.

youdao

为保证生产，BAULI公司雇用了大量季节性工人，最多时超过1200人，而BAULI的固定员工，也就在800人左右。

Instead, Bauli hires lots of seasonal workers to work on dedicated production lines: up to 1,200 of them at peak times, more than its permanent staff of around 800.

youdao