✨ 语义深度解析 ⋮
constant
高考核心词 作文加分词 难度 1/5 ⏱ 2 分钟
核心
不断的；持续的；不变的——描述持续存在或保持不变的状态
释义
1
adj.不断的，持续发生的
Working in an environment of constant change requires employees to develop a high degree of adaptability and resilience.
在不断变化的环境中工作要求员工培养高度的适应性和韧性。
2
adj.恒定的，保持不变的
The experiment requires that the temperature be kept at a constant level throughout the procedure to ensure accurate and reproducible results.
实验要求在整个过程中将温度保持在恒定水平，以确保准确和可重复的结果。
3
n.常量；不变的因素
While management styles and priorities may shift over time, maintaining excellent customer service has remained a constant throughout the company's history.
尽管管理风格和优先事项可能随时间而变化，保持卓越的客户服务始终是公司历史中的不变因素。
语感
constant change / pressure（不断的变化/压力）；at a constant speed / temperature（以恒定速度/温度）；constantly（副词：不断地）；a constant（名词：不变的事物）
不断的，持续发生的恒定的，保持不变的常量（名词），不变的因素
陷阱
⚠️continuous（无间断）vs. continual（反复但有间歇）vs. constant（一般持续）
The factory operates on a continuous production cycle, running twenty-four hours a day without scheduled shutdowns.
✗
continuous = continual = constant（三者完全等同）
✓
continuous（连续不断，无间断：continuous production = 24小时不停的生产；continuous improvement = 持续改进；无空白）；continual（反复发生，有间歇：continual interruptions = 一再发生的打扰；× continuous interruptions（断断续续的，不是持续的）；constant（持续，较广义：constant pressure = 持续压力；constant temperature = 恒定温度；兼顾两者）；此句 continuous production cycle（24小时无间断运转）用 continuous 精确
该工厂以连续生产周期运作，每天24小时不停歇地运行，没有计划停产。（continuous = 无间断；× continual = 有间歇反复）
⚠️constantly（副词）——× constant（形容词作副词）
✗
The technology sector is constant evolving, making it essential for professionals to update their skills on a regular basis.
科技行业在不断演变，这使得专业人士必须定期更新技能。（× constant → ✓ constantly，副词修饰动词）
constantly（副词）修饰动词 evolving；× constant evolving（constant 是形容词，不能直接修饰动词）；constantly = 不断地（副词）；constant = 不断的（形容词，修饰名词：constant change = 不断的变化）；常见错误：× constant improving → ✓ constantly improving
✓
The technology sector is constantly evolving, making it essential for professionals to update their skills on a regular basis.
科技行业不断演变，这使得专业人士必须定期更新技能。（constantly = 副词，× constant）
近义辨析
constant vs persistent
constant constant（持续的：constant pressure = 持续压力；较中性，既可正面也可负面） persistent persistent（顽固持续的，难以消除：persistent unemployment = 顽固的失业问题；persistent offender = 惯犯；比 constant 更强调「尽管有干预仍继续存在」，带负面或顽强义）
The researchers worked under constant pressure to publish results before competing laboratories made similar breakthroughs.
研究人员在持续压力下工作，赶在竞争实验室取得类似突破之前发布结果。
Despite numerous public health campaigns, persistent rates of smoking in certain demographic groups remain a significant challenge.
尽管开展了众多公共卫生宣传活动，某些人口群体中顽固的吸烟率仍是一项重大挑战。
写作加分
✨ 加分词
替换：always happeningnever changingalways
社会问题议论文科技话题教育话题
普通
Technology is always changing, so people need to always keep learning.
技术总是在变化，所以人们需要不断学习。
加分 ✨
In a world of constant technological change, the capacity for lifelong learning is no longer a professional advantage but a fundamental necessity.
在不断技术变革的世界中，终身学习的能力不再是职业优势，而是基本必需品。
常用搭配
constant change / pressure / demand不断的变化/压力/需求
at a constant speed / temperature以恒定速度/温度
remain constant保持不变
constantly（adv.）不断地（× constant 直接修饰动词）
a constant（n.）常量；不变的因素
词根
constant = con（完全）+ st（站立，stand）+ ant → 「完全站立不动的」= 不变的，持续的；constantly = 不断地站立 = 持续地；a constant = 「站立不动的东西」= 常数/不变因素
考考你
Q1对错判断
判断下面句子里的用法是否正确：
The athlete trained under constant supervision, with coaches monitoring her progress daily to ensure she was meeting her performance targets.
constant supervision（持续监督）搭配正确；with + 名词 + 分词 = 独立主格结构，语法正确；to ensure she was meeting = 目的从句，语法正确
Q2近义选词
选择最恰当的词填空：
The region has struggled with ___ poverty for generations, resisting repeated attempts at economic development.
Aconstant
Bpersistent
✓ 该地区数代人都在与顽固的贫困作斗争，一再抵制经济发展的尝试。
persistent poverty（顽固的贫困）比 constant poverty 更精确；persistent 强调「尽管有干预仍难以消除」；resisting repeated attempts = 尽管反复尝试仍继续存在，呼应 persistent 的含义；constant 更中性，不强调「抵抗干预」的含义
Q3义项辨析
下面四个句子中，constant 的含义与其他三个最不同的是：
A
The noise from the construction site was a constant source of disturbance for local residents.
B
Maintaining a constant body temperature is essential for normal physiological function in warm-blooded animals.
C
The speed of light in a vacuum is a universal physical constant.
D
She faced constant criticism from colleagues who questioned her unconventional approach to project management.
C 中 constant = 常数（名词，a physical constant = 物理常数）；A 中 constant = 不断的（a constant source of disturbance = 持续的烦扰来源）；B 中 constant = 恒定的（a constant body temperature = 恒定体温）；D 中 constant = 不断的（constant criticism = 持续不断的批评）
接着学
点击进入该词的深度解析
variable反义可变的；变量（a variable cost = 可变成本；constant 的反面：constant vs. variable = 不变 vs. 可变）
fluctuate反义波动（prices fluctuate = 价格波动；constant 的反面：constant price vs. fluctuating price）
steady近义稳定的，匀速的（a steady pace = 稳定的步伐；steady income = 稳定收入；与 constant 近义但更强调平稳）
intermittent反义间歇性的（intermittent rain = 间歇性降雨；constant 的反面，= continual 的同义）