This forms the basis for our mathematical expression for the electric field.这是电场数学表达式的基础。Mathematical physics is an almost impossibly difficult subject.数学物理是一门难得超乎想象的学科。He towers above his fellow students in mathematical...
我相信我能在别的地方更便宜地买到这种物品。I'm sure I could buy this more cheaply somewhere else.从这个总盘很便宜地复制出塑料盘.From this master disc, plastic discs are stamped out cheaply.她和卖水果的人讨价还价,直到他把水果便宜地卖给了她.She bargained with the trader till he...