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。
Their thesis – that a relatively modest intervention could have a big impact – was based on the view that first-generation students may be most lacking not in potential but in practical knowledge about how to deal with the issues that face most college students.
他们的论文认为，相对适度的干预措施可能会产生重大影响，这一观点基于这样的看法：第一代学生最缺乏的可能不是潜力，而是应对大多数大学生所面临问题的实用知识。
He is a teacher at a New Hampshire high school where learning is not something of books and tests and mechanical memorization, but practical.
他是新罕布什尔州一所高中的教师，那里的学习不是书本、考试和机械记忆的事情，而是实践性的。
practical ability
实践能力
A more practical goal is to try, to the best of your ability, to be as tolerant and composed as you can when faced with 19 situations involving your children.
更实际的目标是尽你所能，在面对涉及你孩子的 19 种情况时，尽可能保持宽容和冷静。
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。