they were supposed to perform domestic duties
他们应该做家务
Children were not colour-coded at all until the early 20th century: in the era before domestic washing machines all babies wore white as a practical matter, since the only way of getting clothes clean was to boil them.
直到20世纪初，儿童才开始被按颜色进行区分：在家用洗衣机出现之前的时代，所有婴儿都穿白色衣服，这在实际中是合理的，因为当时唯一清洁衣物的方法就是煮沸。
First two hours, now three hours - this is how far in advance authorities are recommending people show up to catch a domestic flight, at least at some major u.s. airports with increasingly massive security lines.
最初建议提前两小时到达，现在则建议提前三小时——这是美国一些主要机场的安检队伍越来越长的情况下，当局推荐人们搭乘国内航班时提前到达的时间。
For decades we have not taken responsibility for investing in our domestic wood supply, leaving us exposed to fluctuating prices and fighting for future supplies of wood as global demand rises and our own supplies fall.
几十年来，我们没有承担起投资本国木材供应的责任，导致我们暴露在价格波动的风险中，并在未来木材供应上与全球需求上升、本国供应下降的趋势相抗衡。
increase its domestic wood supply
增加其国内木材供应
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。