11. covering 包括......的 , 涉及......的 , 有关......的
例句: Please let us he your pricelist covering your typewriters.
12. sth. be of interest to sb. 使感兴趣 , 有兴趣
例句: This article is of special interest to us.
注意区分: sb. be interested in sth.
13. upon (or : on) receipt of 到......后 (即......)
例句: On (or : Upon) receipt of your instrucions we will send the goods.
14. requirement n. 需要 ; 需要之物
例句: We can meet your requirements for (or: of) Walnutmeat.
15. trade n. 贸[收起]