偶极子在它的轴的方向上不发射能量.The dipole does not radiate energy in the direction of its axis.欲求的因子为图40那样的脉冲偶极子.The desired operator is the spike doublet of Figure 40.自然界中只能出现磁偶极子以及磁多极子的形式.Only magnetic dipole and higher multipole co...
It is a sensuous but demanding car to drive.这车坐上去很舒服，但需要高超的驾驶技术。He found the rigours of the tour too demanding.他发现这次旅行非常艰苦。She is demanding reimbursement for medical and other expenses.她正在索赔医药费和其他花费。...