(also tranˈsition element) noun [C] one of the group of metals in the centre of THE PERIODIC TABLE(= a list of all the chemical elements). Transition metals are heavy, they melt only at high temperatures, they form coloured compounds, they can combine with another element to form more than one compound, and they often act as aCATALYST(= a substance that makes a chemical reaction happen faster). 过渡金属（居于元素周期表中间，质重，在高温下才熔化，形成色彩绚丽的化合物，能与另一元素形成多种化合物，常用作催化剂）

/ˈtrænsətɪv ||; ˈtrænsətɪv/adj (grammar语法) (used about a verb) that has a direct object （指动词）带直接宾语的，及物的: In this dictionary transitive verbs are marked [T]. 本词典内及物动词用[T]标示。 [OPP] intransitive 反义词为intransitive ☞For more information about transitive verbs, look at the Quick Grammar Reference section at the back of this dictionary. 有关及物动词的详细用法，参看本词典末“语法便览”部份。