2ten to oneinformalPROBABLY used to say that something is very likely 十之八九,十有八九,多半会
Ten to one he’ll have forgotten all about it tomorrow.
他明天多半会把这事忘得一干二净。
3.be ten a pennyBritish EnglishBrE informal to be very common and therefore not special or unusual 很普通,很平常,不稀罕 → be a dime a dozenat dime(2)
4(get) ten out of ten (for something)British EnglishBrEPRAISE used in schools to give a perfectmark, or humorously to praise someone 〔学校〕给打了满分;得满分〔也用作称赞人的幽默说法〕