一、句子——英文（E）
1、The four specimens often used to test levels of chemicals in the human body are urine, blood, hair and human milk.
2、This monitoring is done to determine levels of environmental chemicals in different geographical areas.
3、Even in a world exposed to so many chemicals, breastfeeding offers advantages which outweigh the risk of ingesting possible contaminants.
4、Today the focus of scientific concerns is being directed toward removing potentially toxic chemicals from the environment.
5、Human milk, unlike manufactured formula, does not add to the ecological burden of the planet.
6、Human milk cannot be duplicated.
7、 It is a living, changing fluid which continually adapts to the needs of the developing infant.
8、Breastfed infants have significantly lower morbidity rates.
9、Breastfeeding offers significant immunologic, developmental and nutritional benefits.
10、This is a reason to eliminate toxins from the environment--not a reason to eliminate breastfeeding.
二、句子——中文（C）
1、经常用来测试人体中的化学物质水平的四个样本是尿液，血液，毛发和人乳。
2、这种监测是为了确定在不同地区环境中化学物质的水平。
3、即使是在接触到这么多化学物质的世界，母乳喂养的优势超越可能摄入受污染物质的风险。
4、现今科学关注的焦点正集中于如何清除环境中的潜在的有毒化学物质。
5、母乳的产生不像生产配方奶那样，会给地球增加额外的生态负担。
6、母乳不能被复制。
7、它是一种根据婴儿成长的需要，会不停地调整成分的有生命力的液体。
8、母乳喂养的婴儿发病率显著较低。
9、母乳喂养能够在婴儿的免疫力、发育水平和营养成分方面提供重大的好处。
10、所以人们要消除的是环境毒素，而不是取消母乳喂养。
三、表达——英中（EC）
1、ecological burden——生态负担
2、adapt to——适应，能应付
3、geographical area——地理区域
四、表达——中英（CE）
1、生态负担——ecological burden
2、适应，能应付——adapt to
3、地理区域——geographical area
五、句子——中文（C）
1、经常用来测试人体中的化学物质水平的四个样本是尿液，血液，毛发和人乳。
2、这种监测是为了确定在不同地区环境中化学物质的水平。
3、即使是在接触到这么多化学物质的世界，母乳喂养的优势超越可能摄入受污染物质的风险。
4、现今科学关注的焦点正集中于如何清除环境中的潜在的有毒化学物质。
5、母乳的产生不像生产配方奶那样，会给地球增加额外的生态负担。
6、母乳不能被复制。
7、它是一种根据婴儿成长的需要，会不停地调整成分的有生命力的液体。
8、母乳喂养的婴儿发病率显著较低。
9、母乳喂养能够在婴儿的免疫力、发育水平和营养成分方面提供重大的好处。
10、所以人们要消除的是环境毒素，而不是取消母乳喂养。
六、句子——英文（E）
1、The four specimens often used to test levels of chemicals in the human body are urine, blood, hair and human milk.
2、This monitoring is done to determine levels of environmental chemicals in different geographical areas.
3、Even in a world exposed to so many chemicals, breastfeeding offers advantages which outweigh the risk of ingesting possible contaminants.
4、Today the focus of scientific concerns is being directed toward removing potentially toxic chemicals from the environment.
5、Human milk, unlike manufactured formula, does not add to the ecological burden of the planet.
6、Human milk cannot be duplicated.
7、 It is a living, changing fluid which continually adapts to the needs of the developing infant.
8、Breastfed infants have significantly lower morbidity rates.
9、Breastfeeding offers significant immunologic, developmental and nutritional benefits.
10、This is a reason to eliminate toxins from the environment--not a reason to eliminate breastfeeding.