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1·You can avoid the single supplement by agreeing to share a twin room.

你如果同意与人共住双人房就可免交单间附加费。《柯林斯英汉双解大词典》

2·While a third of mothers take it pre-pregnancy, some continue to take it throughout, either as a single supplement or as part of a range of vitamins.

虽然三分之一的准妈妈们只是在怀孕前服用叶酸，但有些准妈妈在整个怀孕期内一直持续服用叶酸，或者作为唯一补剂，或者与一些维生素补剂一起服用。

3·If you are travelling alone, the single room supplement is $25 a night.

如果你独自一人旅行，单人间的额外费用是每晚$25。《柯林斯英汉双解大词典》

4·But he prefers to supplement the private system rather than replace it with a single-payer national health service; many of his supporters are business people crushed by the cost of health care.

但他更宁愿选择通过对商业医保系统予以补充而非仰仗国家健康体系这一“唯一支付人”；他的许多支持者是受医保成本影响的商人。

5·His findings are borne out by the many SOB stories posted on the website of the Times Educational Supplement by recent trainees who have failed to secure a single job interview.

你可以在时代教育增刊网站上看到许多因为他的这番话而一份工作都没有找到的毕业生们写的哭哭啼啼的求职经历。

6·A single herbal product could be defined as either a food, a dietary supplement or an herbal medicine, depending on the country.

一种植物产品可以被定义为食品，饮食补充剂或草药，因国家而异。

7·Microorganisms can be used directly as a food source or as a supplement to other foods and are then called single-cell protein.

微生物可直接作为食物来源，或作为一种添加到其它食物中的添加物，并被称为单细胞蛋白。