adj.第四紀的；四的；四進制的
n.四；四進制；第四紀
The Quaternary sediments are largely undeformed. 第四紀的沉積物大部分未變形。
Industries based on brainwork or knowledge are called the quaternary industry. 以腦力勞動或知識為基礎的產(chǎn)業(yè)被稱為第四產(chǎn)業(yè)。
