tangents
n.
正切( tangent的名词复数 );
突然转移话题;
突兀的转向;
（铁路或道路的）直线区间;
例句:
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Draw two tangents to the two branches of the curve.
画出该曲线两个分支的两条切线.
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Figure 13 . Tangents and Normals changed on a skinned model.
图 十三 在蒙皮的模型上切线与法向是变动的.
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Construct an animation of three concurrent tangents of the astroid.
建构一动态绘图:展示星状线共点的三切线.
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His thoughts wandered off onto all sorts of tangents.
来自NEWYORKER
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I want her to quit going off on tangents.
来自NEWYORKER
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It all makes for some intriguing tangents.
来自BBC