1
solve an equation
The students learned how to solve quadratic equations.
学生们学会了如何解二次方程。
方程式；等式
先理解核心含义，再看它在真实句子里的用法。
方程式；等式
A statement showing that two expressions are equal, typically containing an equals sign.
The students learned how to solve quadratic equations.
学生们学会了如何解二次方程。
The act or process of equating two or more things, or the state of those things being equal (that is, identical).
An assertion that two expressions are equal, expressed by writing the two expressions separated by an equal sign; in mathematical problems, equations describe various essential aspects of the problem, each of which contributes to the resolution of the problem in part.
A small correction to observed values to remove the effects of systematic errors in an observation.
The teacher wrote the equation x + 5 = 10 on the blackboard.
老师在黑板上写下了等式 x + 5 = 10。
In algebra class, we solved several quadratic equations.
在代数课上，我们解了几个二次方程。
To find the value of y, you need to balance the equation.
要找到 y 的值，你需要平衡这个等式。
The students learned how to solve quadratic equations.
学生们学会了如何解二次方程。
常用于数学或科学语境。
You need to find the equation of the line.
你需要求出这条线的方程式。
引申义，表示考虑的因素。
Other factors come into the equation.
其他因素也纳入考虑。
Not this
I need to solve equation.
Use this
I need to solve an equation.
中文中“解方程”没有冠词，但英语可数名词单数前需要冠词，如'an'或'the'。
Not this
We equation the two variables.
Use this
We equate the two variables.
'equation'是名词，不能用作动词。动词形式是'equate'，表示“使相等”。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
解方程
The students learned how to solve a quadratic equation.
学生们学会了如何解二次方程。
二次方程
A quadratic equation has the form ax^2 + bx + c = 0.
二次方程的形式为 ax^2 + bx + c = 0。
线性方程
This linear equation can be graphed as a straight line.
这个线性方程可以画成一条直线。
数学方程
Einstein's famous mathematical equation is E=mc^2.
爱因斯坦著名的数学方程是 E=mc^2。
配平方程
In chemistry, you must balance the equation to conserve atoms.
在化学中，你必须配平方程以保持原子守恒。
运动方程
The equation of motion describes how an object moves under forces.
运动方程描述物体在力作用下如何运动。
Use equation naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆：equ- 意为相等（equal），-ation 是名词后缀，合起来是‘等式’。
中性语境，多用于数学、物理、化学等科学领域，表示两个表达式相等的关系。
All listed words share the same stressed vowel /eɪ/ and ending /ʃən/ (or /ʒən/ for equation). Words like 'question' (/ˈkwɛstʃən/) have a different stressed vowel /ɛ/ and are not rhymes.
Dictionary facts from ECDICT, WIKTIONARY.