They recall the good buddies they used to have in middle school.他们想起了过去上中学时的好伙伴。He was a middle school student at the age of 14.他14岁时是个中学生.He was not good at algebra in middle school.他中学时不擅长代数....
这类张量叫做反对称张量或斜对称张量.Tensors of this kind are called antimetric or skew - symmetric.要求反对称波函数的粒子, 如电子, 叫做费米子.Particles, such as electrons, requiring antisymmetric wave functions are called fermions.注意结构是对称的,而节点线位移表示反对称荷载.We ...