乘氏，古县名。西汉建立之初，始设乘氏县，属古兖州济阴郡，治所在今山东省菏泽市巨野县龙固镇一带。南朝宋时废。 北魏太和十一年，复置乘氏县于今菏泽城区。金朝大定六年（1166年），废乘氏县入济阴县。
就像埃文斯展示给她的那样，即便是乘地铁时莱氏正好坐在拍照对象旁边，直角取景器也可让她神不知鬼不觉地完成拍摄。
A right-angle viewfinder allowed her to take the picture without them knowing, even, as Evans showed her, when riding right beside them in the subway.
本文通过对已识别拉氏乘子法的初步探讨，指出了已识别拉氏乘子法是变分原理中泛函变换的统一方法。
Based on a preliminary study on the identified multiplier method, it is pointed out in this paper that this method is a unite method of functional transformation in variational principle.
然后应用拉氏乘子法于有限变形回弹变分原理建立有限变形广义回弹变分原理。
Then, Lagrange arithmetic operator is applied in variation principle of finite deformation resilience to establish a generalized variation principle of springback.
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