She always referred to them as 'the shifting population', for they came and went with such frequency that I never even got a chance to learn their names.
她称这些佣人叫“流动人口”，因为他们来匆匆，所以我甚至都没有机会知道他们的姓名。
新概念英语第三册
Lesson 49 The ideal servant
📚 句中词汇解析
从本句中提取的重要词汇
n. 人口;全体居民;特定[生物]种群;[物]布居;
💡 popul人民+ation表示行为、状态→ 全体居民，人口
"A census of population is taken every ten years."
人口普查每10年进行一次.
近义：people, demographic, demographical
n. 频繁性;[数][物]频率，次数;频率分布;
💡 fr + equ =equal,even,表示“相等，平均” + enc + y [形容词后缀] → n.屡次；次数；频率
"Fatal road accidents have decreased in frequency over recent years."
近年来致命交通事故发生率已经下降。
近义：assiduity, periodicity, regularity, chronicity
反义：uncommonness
n. 机会，机遇;概率，可能性;偶然，运气;
v. 偶然发生;冒险;碰巧;偶然被发现;
adj. 意外的;偶然的;碰巧的;
💡 碰巧有 机会阐(chan)述我的计策(ce)
"I would do it if I had the chance."
如果我有机会的话，我也会那么做。
近义：hazard, imperil, jeopardise, jeopardize, risk, stake
反义：assurance, assuredness, obviousness, palpability, patency, positiveness
vt.& vi. 学习，学会;习得;得知;记住;
vt. 记住;学习;得知;认识到;
vi. 学习;获知;
💡 学习好才能挣钱(earn)
"Children must learn socially acceptable behaviour."
儿童必须学会社会上认可的行为举止。
近义：know, acquire, develop, find, realize
反义：forget
v. 来( come的过去式 );到达;达到（认识、理解或相信的程度）;出生;
"The water came above our knees."
水淹过了我们的膝盖。