Multiplying a point on the curve by a number will produce another point on the curve, but it is very difficult to find what number was used, even if you know the original point and the result.

曲线上的一点乘以数量将产生另一个点在曲线上，但是很难找到什么号码，即使你知道原始点和结果。

youdao

Second, is difficult for professionals to study from a practical point of view: such as design, produce, etc, which is substituted by the theoretical studies from the aesthetic;

从知识构成上来说，理论专业的学者难以从实践角度深入紫砂的设计、制作等环节进行论述，只能重点从理论层面进行研究；

youdao