The quinary sector also includes domestic activities such as those performed by stay-at-home parents or homemakers.
五部门的还包括国内的活动,如由呆在家里父母或家庭主妇。
2
The invention relates to a quinary polymerization fluororesin containing hydroxy and a synthesis method of the quinary polymerization fluororesin.
本发明涉及一种含羟基的五元共聚氟树脂及其合成方法。
3
This World Expo Shanghai Participating Nations' Pavilions Quinary Medallion Set is made by authorization of the Bureau of Shanghai World Expo Coordination.