expressions
expressions的音标是[?k?spres?z?nz];中文翻译为“表达;表情;表现”;其词源为拉丁语词根“ex”+“press”表示挤压、压紧,从而表达、呈现的意思。
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以下是一些速记技巧和变化形式,可以帮助你更有效地记忆表达式的含义:
1. 联想记忆:将表达式与熟悉的图像或场景联系起来,帮助记忆。例如,将“sin(x)”想象成“山顶上的小屋”,将“cos(x)”想象成“湖中的倒影”。 #
2. 口诀记忆:将复杂的表达式简化为易于记忆的口诀。例如,“正弦sin余切cot,对顶角等价于零”,可以帮助记忆正弦和余切之间的关系。
3. 拆分记忆:将复杂的表达式拆分成几个简单的部分,逐个记忆。例如,“x^2+y^2=z^2”可以拆分为“x^2+y^2=r^2-z^2”,其中r是半径,z是高度。
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4. 对比记忆:将相似的表达式进行对比,找出它们的区别和共同点。例如,比较“f(x)=x^2+y^2”和“f(x)=x^3+y^3”,找出它们的不同点和相似之处。 #
5. 重复记忆:多次重复记忆表达式的含义和变化形式,有助于巩固记忆。可以使用多种方式重复,如口头重复、笔记、卡片等。
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6. 变化形式:熟悉表达式的各种变化形式,如逆变换、微分、积分等,有助于更好地理解和记忆表达式的含义。
以上技巧可以帮助你更有效地记忆表达式的含义和变化形式,但请注意,每个人的学习方式和习惯不同,因此需要根据自己的实际情况选择适合自己的技巧。 #
常用短语6个: #
1. expression after 根据...表达 #
例句:He expressed his gratitude to the teacher after receiving the gift. #
2. expression of 表达...的意思
例句:She expressed her love for her family in a letter.
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3. expression of emotion 表达情感 #
例句:She used facial expressions to express her emotions. #
4. in expression 在表达中 #
例句:He was in expression when he was writing the letter. #
5. with expression 用表情
例句:She sang with expression while playing the piano. #
6. express oneself 表达自己的想法 #
例句:She finds it difficult to express herself in English.
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常用双语例句7个:
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1. She used facial expressions to express her emotions clearly.(她用表情清楚地表达了她的情感。)
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2. He expressed his gratitude to the teacher in a heartfelt way.(他以真诚的方式向老师表达了感激之情。) #
3. She expressed her love for her family in a letter they received as a surprise.(她在家人收到的信中表达了对家人的爱,令他们感到惊喜。) #
4. She used words and expressions from her culture to express herself confidently.(她自信地使用了自己文化中的词语和表达方式来表达自己。) #
5. He was in expression when he was writing his novel.(他写作小说时,表情丰富。) #
6. She sang with expression while playing the piano, making the music come alive.(她在弹钢琴时,用表情演唱,让音乐变得生动起来。)
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7. She found it difficult to express herself in English, especially when trying to describe emotions.(她发现自己在英语中表达自己,尤其是试图描述情感时,感到困难。) #

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