如何使用 "pollen" 造句

1. The air is pure , with neither pollution nor pollen .
空气是那么纯,没有污染物也没有花粉。
2. Plan workouts when pollen counts are low .
在花粉含量低的时候进行锻炼。
3. Pollen samples indicated forests were replaced by fields of cotton and corn .
花粉样本也表明森林被棉花地和玉米地所取代。
4. Pollen is usually blown to other trees and fertilizes their ovules .
花粉通常会被风吹到其它树上使其受精。
5. Also , seeds and pollen found in them can help reconstruct previous environments .
其中含有的种子和花粉还可以帮助重构先前的环境状况。