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定语从句（12）
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二、修饰主句的某一部分（而不是某个名词）的非限制性定语从句(不常见，目前不作要求)
Doing so, which requires a much greater analysis effort(分析努力), yields(产生) the following expression (以下的表达式). Here we neglect(忽略) the constant (常数) of integration(积分), which, in future, we should do always. If the swimmer(游泳者) takes(洗) a hot shower(热水澡) afterward(游泳之后), which he certainly will, heat flows(流动) in the reverse(相反的) direction.
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Water changes to vapor(蒸汽) at 100oC, which wood(木头) does not.
Metals(金属) can conduct(传导) electricity(电), which non-metals(非金属) cannot. This type of steel(钢) is very hard(硬的), which indeed(的确) it is. We assume(假设) that A is large, which it must be for a well-designed circuit(设计良好的电路). If is small, which it is in this case, then(那么) tan = .
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课堂练习：英译汉 1. A right triangle(直角三角形) is a triangle two of whose sides(边) are perpendicular(垂直的). 2. The point(点) where the circle(圆) cuts the axis of reals(实轴) is where = . 3. Symbolic programming(符号编程) may be defined(定义) as a method (方法) wherein names(名称), instructions (指令), and symbols(符号) are used to write programs(程序).
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4. Since the object(物体) is in equilibrium(平衡), the sum(和) of the horizontal forces(水平力) equals(等于) zero(零), whence P = T sin .
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