Question

constant n.[数、物]常数,恒量 adj.不变的,持续的,坚决的 Constant derives from Latin verb meaning "to stand with," so something constant is continually standing with you and not wavering. You may be thankful for the constant companionship of your dog but not necessarily for your teacher's constant homework assignments. In math and science, a constant is a number that is fixed and known, unlike a variable which changes with the context. That idea crosses over to real life. If a friend is a constant in your life, that means they have always been with you and there for you. ★★★★☆ 2013.1

Accepted Answer

['kɔnstənt] Think of something or someone that does not change as constant. A classmate's constant drumming on the table with his fingers could be a constant source of annoyance. Vanity is a constant; people will only start shopping more sustainably when they can’t afford to it. 1[ADJ 形容词]持续不断的；重复的；一直存在的 You use constant to describe something that happens all the time or is always there.   [usu ADJ n]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。Inflation is a constant threat...通货膨胀始终是个威胁。He has been her constant companion for the last four months.4个月来，他一直陪伴在她身边。constantlyThe direction of the wind is constantly changing...风向不断变化。We are constantly being reminded to cut down our fat intake.不断有人提醒我们要减少脂肪的摄入量。2[ADJ-GRADED 能被表示程度的副词或介词词组修饰的形容词]恒定的；不变的 If an amount or level is constant, it stays the same over a particular period of time. The average speed of the winds remained constant.平均风速保持稳定。3[N-COUNT 可数名词]恒定物；常数；常量；常项 A constant is a thing or value that always stays the same. 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。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。Usage Note :You can use constant, continual, and continuous to describe things that happen or exist without stopping. You describe something as constant when it happens all the time or never goes away. He was in constant pain. ...Eva's constant criticism. Continual is 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 is continuous, 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)。

英语单词	constant
英美音标	['kɔnstənt]
中文释义	n.[数、物]常数,恒量 adj.不变的,持续的,坚决的
vocab简明	Think of something or someone that does not change as constant. A classmate's constant drumming on the table with his fingers could be a constant source of annoyance.
vocab扩展	Constant derives from Latin verb meaning "to stand with," so something constant is continually standing with you and not wavering. You may be thankful for the constant companionship of your dog but not necessarily for your teacher's constant homework assignments. In math and science, a constant is a number that is fixed and known, unlike a variable which changes with the context. That idea crosses over to real life. If a friend is a constant in your life, that means they have always been with you and there for you.
真题原句	Vanity is a constant; people will only start shopping more sustainably when they can’t afford to it.
柯林斯星级	★★★★☆
柯林斯解释	1 [ADJ 形容词]持续不断的；重复的；一直存在的 You use constant to describe something that happens all the time or is always there. [usu ADJ n] 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。 Inflation is a constant threat... 通货膨胀始终是个威胁。 He has been her constant companion for the last four months. 4个月来，他一直陪伴在她身边。 constantly The direction of the wind is constantly changing... 风向不断变化。 We are constantly being reminded to cut down our fat intake. 不断有人提醒我们要减少脂肪的摄入量。 2 [ADJ-GRADED 能被表示程度的副词或介词词组修饰的形容词]恒定的；不变的 If an amount or level is constant, it stays the same over a particular period of time. The average speed of the winds remained constant. 平均风速保持稳定。 3 [N-COUNT 可数名词]恒定物；常数；常量；常项 A constant is a thing or value that always stays the same. 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。 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。 Usage Note : You can use constant, continual, and continuous to describe things that happen or exist without stopping. You describe something as constant when it happens all the time or never goes away. He was in constant pain. ...Eva's constant criticism. Continual is 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 is continuous, 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)。
来源	2013.1

Constant Continuous Continual Describe Time Cut Number Ly