单语范例（未经PONS编辑处理）
英语
- Fertilization in a chasmogamous flower depends on the receipt of appropriate pollen, and often fails.en.wikipedia.org
- A chasmogamous flower opens at maturity, exposing stamens and style to allow fertilization.en.wikipedia.org
- There are cleistogamous flowers, which self-fertilize and never open, and chasmogamous flowers, which open and receive pollen from other plants.en.wikipedia.org
- The petals of a chasmogamous flower can be attractive to pollinators; cleistogamous flowers often lack petals.en.wikipedia.org
- There are both cleistogamous flowers which never open, and chasmogamous flowers which open and allow insects inside; both types produce seed.en.wikipedia.org
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