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农学
甘薯疮痂病
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sweetpotato scab
甘薯疮痂病
由甘薯痂囊腔菌(Elsinoë batatas)引起,主要为害甘薯叶、藤蔓的一种真菌病害。又称甘薯缩芽病、甘薯硬杆病、甘薯麻风病、狗耳病等。
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positive definite tensor
positive definte rational fanction
positive deviation
positive diffeomorphism
positive diffeomorphisms
positive differential
positive direction
positive displacement compressor
positive displacement flowmeter
positive displacement motor drill
positive displacement pump
positive displacement sensor
positive distinctiveness
positive distribution
positive divisor
positive divisorial ideal
positive domain
positive drawing
positive drive lift
positive dromotropic action
positive edge
positive effect of organizational communication
positive eigenvalue
positive eigenvalued matrix
positive eigenvector
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