They may be merely additions to existing product lines (the first cigarette with a filter tip, for instance) or improvements to existing products (a new whiter-than-white washing powder).
它们也可能仅仅是在现有的产品上增加了一些东西(比如推出带有过滤嘴的香烟)，或者是对现有的产品做出改良(比如一种能把衣服洗的更白的洗衣粉)。
The government must be seen to be whiter than white.
政府须让人觉得是清正廉洁的。
Take care not to overdo it, unless you are working on a ‘whiter than white toothpaste ad’.
小心，别做得太过了，除非你是在做“比白色更白的牙膏广告”。
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