transition metal
noun /trænˈzɪʃn metl/
/trænˈzɪʃn metl/
(also transition element)
(chemistry- one of the group of metals in the centre of the periodic table (= a list of all the chemical elements) that form coloured compounds and often act as catalysts (= substances that make chemical reactions happen faster)
过渡金属(位于元素周期表中心的一组金属元素,可形成有色化合物,常作为催化剂)