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Quaternary System
geol. 第四纪〔系〕
hydroel.st. 第四系
quaternary system
agric. 第四系｛土壤｝
met. 四元系
tech. 四元制; 四元体系; 四进制; 四个一组系统
quaternary systems
chem. 四元系
Quaternary system
tech. 第四系【地】
Quaternary System
: 21 phrases in 3 subjects
Agriculture1
Plastics1
Technology19

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