這是電場數學表達式的基礎。This forms the basis for our mathematical expression for the electric field.可以認出,此表達式正好就是標積.We recognize this expression as just the scalar product.我們只推導出對于劇烈鼓泡床的表達式.We develop only the expressions for vigor...

“表達式”的拼音為：biǎo dài shì...