constant

英 [ˈkɒnstənt]

美 [ˈkɑːnstənt]

adj. 连续发生的; 不断的; 重复的; 不变的; 固定的; 恒定的
n. 常数; 常量

复数：constants　

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Oxford 3000 / Collins.4 / BNC.1915 / COCA.2386

牛津词典

adj.

连续发生的；不断的；重复的
happening all the time or repeatedly
1. constant interruptions
  无休止的干扰
2. a constant stream of visitors all day
  整天络绎不绝的游客
3. Babies need constant attention.
  婴儿一刻也离不开人。
4. This entrance is in constant use.
  此入口经常使用。
不变的；固定的；恒定的
that does not change
1. travelling at a constant speed of 50 m.p.h.
  以每小时50英里的恒定速度行驶

noun

常数；常量
a number or quantity that does not vary

柯林斯词典

ADJ 持续不断的;重复的;一直存在的
You useconstantto describe something that happens all the time or is always there.
1. She suggests that women are under constant pressure to be abnormally thin...
  她暗示说女性总是处在保持身材异常瘦削的压力之下。
2. Inflation is a constant threat...
  通货膨胀始终是个威胁。
3. He has been her constant companion for the last four months.
  4个月来，他一直陪伴在她身边。
ADJ-GRADED 恒定的;不变的
If an amount or level isconstant, it stays the same over a particular period of time.
1. The average speed of the winds remained constant.
  平均风速保持稳定。
N-COUNT 恒定物;常数；常量；常项
Aconstantis a thing or value that always stays the same.
1. In the world of fashion it sometimes seems that the only constant is ceaseless change...
  在时装界，有时似乎唯一永恒不变的东西就是不断的变化。
2. Two significant constants have been found in a number of research studies.
  若干研究已经发现了两个重要常量。

You can useconstant,continual, andcontinuousto describe things that happen or exist without stopping. You describe something asconstantwhen it happens all the time or never goes away.He was in constant pain. ...Eva's constant criticism.Continualis usually used to describe something that happens often over a period of time, especially something undesirable....his continual drinking. ...continual demands to cut costs.If something iscontinuous, it happens all the time without stopping, or seems to do so....days of continuous rain. ...a continuous background noise.
constant, continual 和 continuous 均可用来描述不断发生或一直存在的事物。constant 表示一直在发生或从未消失：He was in constant pain (他的疼痛一直没有消停)，Eva's constant criticism (伊娃没完没了的批评)。continual 通常用来形容一段时期内经常发生的事，尤其是令人讨厌的事：his continual drinking (他经常饮酒)，continual demands to cut costs (不断要求削减成本)。continuous 表示一直没有间断，或者貌似如此：days of continuous rain (淫雨霏霏的日子)，a continuous background noise (持续不断的背景噪音)。

英英释义

noun

a quantity that does not vary
Synonym:constant quantityinvariable
a number representing a quantity assumed to have a fixed value in a specified mathematical context
1. the velocity of light is a constant

adj

steadfast in purpose or devotion or affection
1. a man constant in adherence to his ideals
2. a constant lover
3. constant as the northern star
uninterrupted in time and indefinitely long continuing
1. the ceaseless thunder of surf
2. in constant pain
3. night and day we live with the incessant noise of the city
4. the never-ending search for happiness
5. the perpetual struggle to maintain standards in a democracy
6. man's unceasing warfare with drought and isolation
7. unremitting demands of hunger
Synonym:ceaselessincessantnever-endingperpetualunceasingunremitting
unvarying in nature
1. maintained a constant temperature
2. principles of unvarying validity
Synonym:changelessinvariantunvarying

双语例句

Constant vigilance is necessary in order to avoid accidents.
为了避免意外事故，必须经常保持警惕。
His body is honed and kept in trim with constant exercise.
他经常运动，以锻炼身体和保持身材。
Constant effort yields sure success.
功到自然成。
In the world of fashion it sometimes seems that the only constant is ceaseless change
在时装界，有时似乎唯一永恒不变的东西就是不断的变化。
Throughout the house, the views are a constant source of surprise and delight
从房子各处看到的景色不断给人以惊奇和欣喜。
The constant repetition of violence has blunted the human response to it
反复出现的暴力事件使人们的反应都变得麻木了。
Inflation is a constant threat
通货膨胀始终是个威胁。
The capital is still under constant bombardment by the rebel forces.
首都仍在遭受叛军的持续轰炸。
The dynamic of the market demands constant change and adjustment
市场要有活力，需要不断地改变和调整。
They will have to bear the misery of living in constant fear of war
他们不得不忍受长期生活在战争恐惧中的痛苦。