Tennis rackets used to be strung with something called catgut, but there never was an industry breeding cats for use in this application.
从前，网球拍上的弦叫做catgut（译注：字面意思是猫的内脏），但从来就没有哪种产业靠养猫来生产这种东西。
Nowadays great economic effect had been achieved in agriculture and industrial microbial breeding. But no application of ion beam had been reported in officinal plant breeding.
目前，离子束在农业和工业微生物育种的应用上已产生了巨大的经济效益，但鲜见离子束在药用植物育种上的应用报道。
This paper elaborates the discovery and effect of monokaryon and homokaryon protoplasts and their application in genetic and breeding research of edible mushroom.
本文阐述了食用菌单核和同核原生质体的发现和作用以及在食用菌遗传研究上的应用前景。
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