The problem occurs because plants need to transfer pollen by wind and insect to fertilization and reproduction.

这个问题的出现是因为植物需要通过风和昆虫来传递花粉以受精和繁殖。

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Pollen from a Pistia: Hayfever occurs because plants need to transfer pollen by wind and insect to fertilization and reproduce.

水浮莲花粉：发生花粉热是因为植物需要通过风或昆虫传递花粉进行受精繁殖。

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The key to fertilization technology lies in increasing investment of organic fertilizer, paying attention to microelement fertilizer's application and extending fertilizer formula after soil testing.

四川盆周山区猕猴桃施肥技术的关键在于大力增加有机肥的投入、重视微肥的有效施用、推广测土配方施肥。

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In 1968, Dr. Edwards teamed with Dr. Steptoe to study fertilization and develop methods that would allow the sperm and egg to survive outside the womb.

WSJ: Robert Edwards, Pioneer of In Vitro Fertilization

In response to concerns that large-scale ocean fertilization might be attempted before its consequences were fully understood, CBD, Parties to the LC and LP and IOC have urged governments to ensure that ocean fertilization activities do not take place until there is an adequate scientific basis on which to justify such activities, including an assessment of associated risks.

UNESCO: MEDIA SERVICES

These proposed interventions range from ocean fertilization to large-scale cloud seeding.

UNESCO: EDUCATION