在裂解原料或稀释蒸汽中添加结焦抑制剂是目前延长装置运转周期较为有效的方法之一。
Adding coking inhibitor to the dilute steam or cracked raw materials is one of the effective methods to lengthen unit-operating cycle at present.
同位素稀释分析是研究氮素在土壤植物体系中转化和迁移特征的有效方法。
Isotope dilution analysis is a valid approach for studying nitrogen transformation characteristics in soil-plant systems.
使用估计现金有效税率为19%，非一般公认会计准则的净收入为2006年第四季度则为157.8亿美元，非公认会计原则稀释办事则为0.68。
Using an estimated effective cash tax rate of 19%, non-GAAP net income for the fourth quarter of 2006 was $157.8 million and non-GAAP diluted EPS was $0.68.
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