那个孩子在滚铁环.The child was rolling a hoop.“ 两星期前用一根推铁环的棍子和贝恩-罗杰换的. ”" Bought it off'n Ben Rogers two weeks ago for a hoop - stick. "男孩子们在街上滚铁环.The boys rolled their hoops down the street....
它们对被它们催化的反应有很强的专一性.They are highly specific for the reactions that they catalyze.这个脱羧作用是由谷氨酸脱羧酶催化的.This decarboxylation is catalysed by the enzyme glutamic acid decarboxylase.这个复合反应是被邻氨基苯甲酸合成酶催化的.This complex reaction is...