1. Water-based pigment. Easy to color, the more viscous, extremely delicate, easily controlled. Anti-color purity. For totem, secant greasy. 水性色料。易上色，较粘稠，极其细腻，容易控制。反色纯正。适用于图腾，割线腻。
2. High quality natural fiber blended yarns are obtained through blended spinning of secant slenderized wool and mercerized cotton under certain proportion. 介绍了自主研发的拉伸羊毛与丝光棉条加工、纤维性能以及混纺纱线的加工技术。
3. A new method on seeking asymptote is given by applying the relation between secant and asymptote, this method is helpful to train creativity of students. 利用曲线割线的极限得到曲线的渐近线，给出了求渐近线的一种新方法。这种方法直观性强，有助于培养学生的创新能力。
英英解释
n.
1. a straight line that intersects a curve at two or more points
2. ratio of the hypotenuse to the adjacent side of a right-angled triangle
