柑桔衰退病毒(CTV)存在着许多生物学特性不同的株系。
Citrus tristeza virus (CTV) has a number of distinct strains differing in biological characteristics in citrus fields.
景气循环二分为景气繁荣与景气衰退时期；公司特性则分为新经济公司与旧经济公司。
The economic cycle is dichotomized as expansion and recession periods while the companies are categorized as new economy firms and old economy firms.
景气循环二分为景气繁荣与景气衰退时期；公司特性则分为新经济公司与旧经济公司。
The economic cycle is dichotomized as expansion and recession periods while the companies are categorized as new economy firms and old economy firms.
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