枯草热

He’s been a lifelong sufferer from hay fever.

他终身患枯草热。

The pollen of the weed is the main sensibiligen of hay fever in human.

豚草花粉是人类枯草热症主要致敏源。

Hay fever sufferers have a worse time when the pollen count is high.

花粉计数高时，枯草热患者日子就更好过了。