The progress of petrochemical "three agents"(catalyst, additive and process assistant) is summarized, the industrial application results of some of the products are described, and their major research trend is summarized.
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通常在婴儿期从约6周大时开始注射三剂。
Three doses are usually administered in infancy, starting at around age six weeks.
杰克逊的侄子基斯·杰克逊所在的三剂量乐队(Triple Dose Band)也在表演者之列。
Among the performers was the Triple Dose Band, whose members include Jackson cousin Keith Jackson.
已知双金属和三金属催化剂提供了优于单金属催化剂的性能。
It is known that bimetallic and trimetallic catalysts offer improved properties over single metal catalysts.
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