backlog an accumulation of jobs not done or materials not processed that are yet to be dealt with (especially unfilled customer orders for products or services)老师好,我知道yet是非肯定词,这里表示的就是一种不确定会不会被解决的状态是吧
We live in an age of rapid technological advance/advancement.advance本身可做名词,表示“发展”的意思,advancement在advance后加后缀,构成名词,也有“发展”的意思,那么,advance和advancement两者在表达上有什么区别?