Unit 31. 他在讲话中特别强调提高产品质量。 In his speech he laid special stress on raising the quality of the products.2 采用这种新装置可以大大降低废品率。The adoption of this new device will greatly cut down the percentage of defective products.3社会主义革命的目的是为了解放生产力。Socialist revolution aims at liberating the productive forces.4 他们一不会做工，二不会种地，三不会打仗。They do not know a thing about factory work, nor about farm work, nor about military affairs.5 语言这个东西不是随便可以学好的，非下苦功不可。The mastery of language is not easy and require
