我们过去都是靠种籽来培育新一代的种苗，但世界银行建议采取无性系种苗扦插技术，这样产生的种苗遗传增益高多了。
We used to rely on seeds to grow the next generation of trees but the World Bank proposed the use of cloning seedlings. This led to a much higher yield.
该超一代摄象管的亮度增益比为1200，基本上超过了同等价值的一代管。
TheCF-Super light amplification ratio of 1200 essentially exceeds a similar value of the gen. 1 tube.
该超一代摄象管的亮度增益比为1200，基本上超过了同等价值的一代管。
TheCF-Super light amplification ratio of 1200 essentially exceeds a similar value of the gen. 1 tube.
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