为了评估感染的风险，研究小组于流感季节在美国乘坐了10次不同的航班。

To evaluate the risks of infection, the study team flew on 10 different flights in the U. S. during the flu season.

youdao

不过对于禽类和猪来说，它们的流感季节是一年四季的。

But for birds and pigs, it's flu season year round.

youdao

然后，即将到来的流感季节意味着更多的挑战即将来临。

However, the arrival of the flu season means the country faces a greater challenge in the months ahead.

youdao