All forms of reciprocal theorems apply to structures which behave linearly.所有形式的互等定理都适用于线性受力状态的结构.His doctoral dissertation on differential equations connected itself with existence theorems.他论述微分方程的博士论文涉及到存在理论.The three...
Queen Mary started the fashion for blue and white china in England.玛丽女王开启了青花瓷在英格兰的流行风尚。Mary Ann doesn't want to have children. Not right now, anyway.玛丽·安不想要孩子，至少现在不想。Nina and Mary were in the kitchen, cleaning up af...