not to speak of In addition to or as well as what's been discussed. Typically used to mention an additional item when listing things that one considers negative. 除了已经讨论过的之外。通常用于在列出一个人认为是负面的东西时，提到另一项作对比。 She can't afford a car, not to speak of a house. 她连车都买不起，更别提买房了。 We defy death, not to speak of hardship and difficulties. 我们死都不怕，更不用说艰难困苦了。 She can speak German and French, not to speak of English. 她能说德语和法语，更不用说英语了。