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。
The problem occurs because plants need to transfer pollen by wind and insect to fertilization and reproduction.
发生这样的问题是因为植物需要通过风和昆虫传递花粉进行受精繁殖。
The problem occurs because plants need to transfer pollen by wind and insect to fertilization and reproduce.
尽管如此，早期的花朵似乎也靠昆虫来传递花粉，随着充当花媒的昆虫的增加，开花植物全面开花的日子也就到来。
Nonetheless, the earliest flowers appear to have been pollinated by insects, and the full-scale blossoming of flowering plants coincides with the rise of animals as go-betweens.
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