《生物医学工程专业英语》Unit 6 Angles Rotations and Degree Measure.pptVIP

Angles, Rotations, and Degree Measure Oct 16th, 2014 New words acute 锐（角） obtuse 钝（角） adjacent 邻近的，紧挨的 origin 原点 Babylonian 巴比伦人 quadrant 象限 circumference 圆周，周长 ray 射线 clockwise 顺时针 reference triangle 参考三角形 complementary 余（角），互补的 revolution 旋转 coordinate 坐标，协调 right triangle 直角三角形 coterminal 共终端的，共端点的 supplementary 补（角） counterclockwise 逆时针的 terminal side 终边 domain 定义域 trigonometry 三角学 hypotenuse 直角三角形的斜边 vertex 顶点 initial side 起始边 Notes (Lines 4-5)An angle is the union of two rays with a common endpoint called the vertex.角是两条有公共端点的射线的组合，这个公共端点称为顶点。 这里with的含义是：having, possessing, or carrying something，在科技文中是一种很常见的表达。 Two travelling waves with the same frequency 两列有相同频率的行波 call：to have a particular name，同义词还有name The TV drama is called Downton Abbey. 那 部电视剧叫做《唐顿庄园》。 The TV drama called/named Downton Abbey is very popular in the year 2010. 电视剧《唐顿庄园》在2010年时很受欢迎。 Notes (Lines 13-15)The Babylonians developed the idea of dividing the circumference of a circle into 360 equal parts, or degrees.巴比伦人发明了将圆周等分为360份，或者度，的方法。Develop（第4单元），发明。 (Lines 19-20)The terminal sides of these angles lie in quadrants I, II, IV, and I, respectively.这些角的终边分别处于第一、二、四、一象限。Respectively,分别地，副词，means in the same order as the items that you have mentioned。一般用于句末，之前常加上逗号。例如 Their sons, Ben and Jonathan, were three and six, respectively. 他们的儿子，本和乔纳森，分别是三岁和六岁。 Notes (Lines 44-45)Many applied problems in trigonometry involve the use of angles that are not acute.三角学中的许多实际问题都需要采用非锐角。 (Lines 53-54)Recalling the definitions in Section 5.1, we note that three of the trigonometric functions of angle θ are defined as follows:回顾5.1节的定义，我们注意到θ角的三个三角函数定义如下： As follows，如下所述，used to introduce a list of things that you will mention next。在科技文里常用此短语，在冒号以后进行列举。 Notes (Line 60)We will use these definitions for functions of angles of any measure.我们将采用这些角度函数的定义，不管角度是多大。 介词搭配：____ position, extend _____, depend ____ Word building Trigonometry 三角学 Photometry 测光法 Symmetry 对称 Geometry 几何 Counterclockwise 逆时针的 Anticlockwise 逆