The quantity of statistical graph and table in foreign and domestic sci-tech periodicals of the same category in 1995—1999 are compared with each other.
比较并分析了1995— 1999年出版的国内外5种同类学术期刊论文中的统计图和统计表的数量。
We can break the balance of nature by increasing the category and quantity of pests' natural enemy so as to limit their growth and thus prevent the harm.
而增加对害虫天敌的种类或数量，来打破自然界的相对平衡，使之不利于害虫种群的增长，从而减少和防止它们的为害。
The system can extend the remote -controlling distance and increase the quantity and category of the controlled devices.
这种遥控系统可以增加遥控的距离，扩展遥控对象的种类和数量。
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