1、Hay fever sufferers have a worse time when the pollen count is high
花粉計(jì)數(shù)高時(shí)，枯草熱患者的日子就更不好過(guò)了。

2、There is a high pollen count in the air.
空氣中有很高的花粉計(jì)數(shù)。

3、There is a high pollen count in the air
空氣中有很高的花粉計(jì)數(shù)。

4、Avoid trips to the country while the pollen count is high.
花粉計(jì)數(shù)高時(shí)，盡量避免去鄉(xiāng)村旅行。