subtraction

英 [səb'trækʃ(ə)n]

美 [səb'trækʃən]

n.  扣除; 减法

复数：subtractions　

高考TOEFLTEM8计算机

BNC.21520 / COCA.21980

柯林斯词典

• VERB 减;减去
  If yousubtractone numberfromanother, you do a calculation in which you take it away from the other number. For example, if you subtract 3 from 5, you get 2.
  1. Mandy subtracted the date of birth from the date of death...
     曼迪用去世的日期减去出生的日期。
  2. We have subtracted $25 per adult to arrive at a basic room rate.
     我们已给每位成人房客减去了 25 美元，这就是基本的房费价格了。

英英释义

noun

• the act of subtracting (removing a part from the whole)
  1. he complained about the subtraction of money from their paychecks
  Synonym:deduction
• an arithmetic operation in which the difference between two numbers is calculated
  1. the subtraction of three from four leaves one
  2. four minus three equals one
  Synonym:minus

双语例句

• This new algorithm uses the background subtraction method to get the foreground image, and then gets the binary image using threshold value and makes the morphology processing.
  该算法利用背景差法获得前景图像，然后进行二值化和形态学处理，再和背景帧进行比较来对滞留和搬移物体进行检测和分类。
• Objective To assess the displaying capabilities and advantages of routine CTA and subtraction CTA of the jugular bulb.
  目的探讨常规CTA及减影CTA技术显示颈静脉球的能力及优势。
• The first two basic operations in mathematics are addition and subtraction.
  数学中两个最基础的运算是加和减。
• This article proposes a pretreatment algorithm based on image registration and digital subtraction.
  论文提出了一种利用图像配准和数字差影的快速预处理算法。
• The easiest one to remember is that multiplication and division happen before addition and subtraction.
  其中，最简单的规则就是乘法和除法在加法和减法之前完成。
• So the adding and the subtraction of vectors is way more complicated than just scalars.
  因此矢量的加法和减法，要比标量复杂。
• Pupils are taught addition and subtraction first.
  小学生首先学加法和减法。
• Objective To evaluate the clinical application of contrast-enhanced digital subtraction MRI in vertebral metastases.
  目的评估增强减影在脊椎转移瘤MRI中的应用价值。
• One of the common methods is based on the background subtraction.
  减背景法是常用的方法之一，但其受环境光照影响；
• Requires addition, subtraction, multiplication, division a function of the design.
  要求加法、减法、乘法、除法各设计一个函数。