fossil pollen grain造句

例句与造句

1. Pollen analysis a means of obtaining information on the composition and extent of past floras and environments by examining fossil pollen grains , spores , and similar structures in peat and sedimentary deposits
   花粉分析：指通过检测花粉化石、孢子以及在泥炭和沉积物中类似的结构，以获得历史上曾有过的植物区系、组分以及分布范围与环境信息的方法。
2. It's difficult to find fossil pollen grain in a sentence. 用fossil pollen grain造句挺难的