1·In the UK drinking water can contain no more than 100 micrograms of THM per litre. A microgram is one millionth of a gram.
在英国每升饮用水中三卤甲烷（THM）不允许超过 100 微克（ 一微克是一克的一百万之一）。
2·A single 15 microgram dose of swine flu vaccine is enough for kids 10 and older, while children under 10 will need two doses, 21 days apart.
对于10岁和10岁以上的孩子们，单个15微克剂量的猪流感疫苗就足够了，而10岁以下的孩子们将需要二个剂量，间隔21天。
3·About 25% of the food items, including spices such as cardamom, fenugreek and chili powder, contained more than 1 microgram of lead per gram of product.
大约25%的食品，每1克食品含有多于1微克的铅，包括豆蔻、葫芦巴和胡椒粉等。