| 释义 |
quaternary/kwəˈtɜ:n(ə)ri/ adj. & n.●adj. 1 fourth in order or rank etc. 第四的，第四等的，第四级的 2 (作 Quaternary) Geol. of or relating to the most recent period in the Cenozoic era with evidence of many species of present-day plants and animals (cf. 参见 PLEISTOCENE, HOLOCENE) 【地质】与后新生代有关的，第四纪的，第四系的 3 Chem. (of an ammonium compound) containing four atoms or groups (other than hydrogen atoms) bonded to a nitrogen atom 【化】四元的，四价的，季的 ●n. (pl. -ies) 1 a quaternary thing, compound, etc. 四元(价、成分)；四元化合物 2 (作 Quaternary) Geol. the Quaternary period or system 【地质】第四纪，第四系 [Middle English from Latin quaternarius from quaterni, distributive of quattuor ‘four’] |