It is a rigid rule in our home to return before ten.
十点之前回家是我们家的死规定。②严厉的。
2
This part discusses synthesized issues of haste return mechanism, rigid object lead mechanism, function creating mechanism and track building mechanism.
研究急回机构综合，刚体导引机构综合，函数生成机构综合，轨迹生成机构的综合性问题。
3
On the effect boundary, risk is return's rigid monotony increase by degrees convex function , return is risk's rigid monotony increase by degrees concave function.