然而，单一种植的人工纯林使鸟类和其他物种的栖息地减小，因此也缩减了人们本能够从生物天然播种过程中的获取的好处。
Monoculture forests reduce the range of habitats for birds and other wildlife and thereby reduce the environmental and economic benefits people derive from wildlife seed-dispersal.
但现行的三系杂交水稻制种技术，自播种至收获完全依靠人工操作，工序繁杂。
Now the process of the hybrid seed production mainly relies on manual, the working procedure is very burdensome.
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