完全正确﹗ 所谓“30, 40, 50, 60, 70”,并非角度,而是三角几何的正切(Tangent) 值转化为百分之几的意思。(0)就是百分之零--平面﹔ (60)就是百分之六十---大约
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tangent bundle [数] 切丛 ; 切扎
Tangent vector 切矢量 ; 切线矢量
upper tangent arc 上正切晕弧
arc tangent [数] 反正切 ; 横竖切 ; 圆弧的切线方向
Project Tangent 曲线切线调整 ; 投射切线 ; 投影切线 ; 映射切线工具
loss tangent 损耗正切 ; 介质损耗
common tangent [数] 公切线 ; 公切
tangent point 切线法
hyperbolic tangent 双曲正切 ; 双曲正切函数 ; 双曲线正切 ; 超正切
N-COUNT A tangent is a line that touches the edge of a curve or circle at one point, but does not cross it. 切线
PHRASE If someone goes off on a tangent, they start saying or doing something that is not directly connected with what they were saying or doing before. 突然离题 [V and N inflect]
The conversation went off on a tangent.
谈话突然偏离了正题。
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