<正> Lesson 75(pp.1—2)1.not to mention,not to speak of,to say nothing of,let alone,muchless这5个短语是学习本文需要掌握的一些重点词汇,都有“更不必说、更不用说、更谈不上”之意。例如:1)She has not learnt arithmetic,not to mention algebra.她算术还没学会,更谈不上代数了。2)We defy death,not to speak of hardships and difficulties.我们死都不怕,更不用说艰苦困难了。3)In old China there was hardly any machine-building industry,tosay nothing of an aviatlon industry.在旧中国几乎没有什么机器制造工业,更不必说航空工业了。