much less   (TTS發音)

and also not；and even less able or likely to更不；更別提

    John couldn't even pick up the box，much less carry it upstairs. 約翰連這箱子提都提不起來，更別說把它搬上樓了。

    I've never seen the man，much less spoken to him. 我見也沒見過這個人，更談不上跟他說話了。

    The boy can hardly understand arithmetic，much less algebra. 那孩子連算術都不大懂，更不用說代數了。