it is extremely difficult to estimate the true value of the services which people perform for us.
但要估算别人为我们为所提供的服务的价值却是极其困难的。
新概念英语第三册 Lesson 27 Nothing to sell and nothing to buy

📚 句中词汇解析

从本句中提取的重要词汇

extremely [ɪk'strimli] 词频2
adv. 极端地;非常，很;去;绝;
💡 extreme极端的+ly表副词 →过分地
"The payment offered to the rank and file is extremely poor."
列兵的待遇极低.
近义：highly, hugely, immensely, inordinately, magnificently, mighty 反义：incompletely, nearly, poorly, barely, scantily, scarce
difficult ['dɪfɪkəlt] 词频1 词根: di
adj. 困难的;难做的;难解的;不易相处的;
💡 dif不+fic做+ult表名词→不好做→困难的
"The short story is a difficult art form to master."
短篇小说是一种很难掌握的艺术形式。
近义：rough, troublesome, complicated, arduous, intricate, labored 反义：uncomplicated, basic, cushy, doss, easy, facile
estimate ['ɛstə,met] 词频2 词根: estim
n. 估计，预测;报价，预算书;评价，判断; vt. 估计，估算;评价，评论;估量，估价;
💡 estim价值+ate动词后缀 → 使之成为有价值的东西的过程 → 估计，估量
"They estimate the number at more than one million each year."
他们估计每天这样的数目将超过一百万。
近义：calculate, appraise, appreciate, assess, rate, valuate
value ['vælju] 词频1 词根: 强壮
n. 价值，价格;意义，涵义;重要性;（邮票的）面值; vt. 评价;重视，看重;估价，给…定价;
💡 val(strong)+ue(名词后缀)→价值；估价；尊重
"The main criterion is value for money."
主要的标准是钱要用得划算。
近义：appreciate, prize, regard, relish, respect, treasure 反义：snub, coldshoulder
people ['pipl] 词频1 词根: 公众
n. 人，人类;居民;人民;种族; vt. 居住于，布满;使住满人，在…殖民;把动物放养在;
💡 popul, publ 表”人民”
"I can't abide people with no sense of humour."
我讨厌和没有幽默感的人打交道。
近义：populate, settle, crowd, individuals, persons, folks 反义：person, single, subject, dude, bleeder, bloke

📚 更多「新概念英语第三册」例句

Several people complained of cat-like noises' at night and a businessman on a fishing trip saw the puma up a tree.
有人抱怨说夜里听见“像猫一样的叫声”；一位商人去钓鱼，看见那只美洲狮在树上。
but few us have had the opportunity to find out.
但很少有人能有机会去弄个究竟。
And he promptly handed the sheet of paper to the gaoler.
说完，他一下子把信递给狱卒。
The man said that the pen was worth $50,
那人说那支笔值50英镑，
It is, in fact, a primitive type of calendar.
事实上是一种最原始的日历。
always assuming,of course, that the sea is calm.
当然，这一切只有在大海风平浪静的情况下才有可能。