“表达式”的英语？

“表达式”的拼音为：biǎo dài shì...

这是电场数学表达式的基础。This forms the basis for our mathematical expression for the electric field.可以认出,此表达式正好就是标积.We recognize this expression as just the scalar product.我们只推导出对于剧烈鼓泡床的表达式.We develop only the expressions for vigor...