These results showed that the period of 3rd-4th year after grafting is key since the orchard was entering the age of full production. It is also important for practice of control pollination.
说明嫁接后第3-4年，是种子园进入盛产的关键时期，也是实施人工控制授粉的有利时期。
A study was conducted under general field condition to control pollination so as to investigate the dynamic of soluble sugar and starch in the cob and silk of two varieties corn.
在一般大田环境中，控制玉米果穗的授粉情况，研究果穗在套 袋和自然授粉时可溶性 糖和淀粉在花丝和穗轴中的变化情况。
By 2045 we should see insect-sized robotic insects capable of flying in co-ordinated swarms. They might be used for crop pollination purposes or as battlefield or crowd control cameras.
到2045年，世界上将有昆虫大小的昆虫机器人，他们能协调地成群飞，可用于作物授粉、战场或群体监控摄像机。
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