zhíwùxué / kè shàng / lǎoshī / bǎ / xiàngrìkuí / de / guǒshí / zuòwéi / shòuguǒ / de / lìzi植物学课上,老师把向日葵的果实作为瘦果的例子。In botany class, the teacher used the fruit of the sunflower as an example of an achene.