subject
其中一个意思：force something to experience something very unplesant，especially for a long time
eg：like any new product entering the food chain ，genetically modified food must be subjected to rigorous testing
disturbing：
解释：make you feel worried or upset
eg：the statistics on population growth and hunger are disturbing
vocal
解释：expressing strong opinions publicly，especially things that you disagree
eg：particularly in countries with long agriculture traditions——and vocal green lobbies——the idea seem against nature
neutralize
解释：prevent something from having any effect
eg：A gene that helps neutralize aluminum toxicity in rice has been identified
hazard
解释：a chance of being injured or harmed；danger
detrimental：有害的 residue：残余 mortality：死亡率 evident：明显的 critical：关键的
merit：价值 优点； 值得 notably：显著的 stepwise：逐步的 equivocal：模糊的，不可靠的 stringent：严格的，严厉的
convert / tansform 的区别
eg：
Coal can be convert to gas / transform dream into reality
句子
- If you want to spark a heated debate at a dinner party，bring up the topic of genetically modified foods。
- He is at the leading edge。//领先地位
- Private-sector biotech companies in the rich countries carry out much of the leading-edge research
- Be deficient in nutrition。
- Incorporateing pest-resistant（抗虫） genes into seeds can help restore the balance//恢复平衡
- It has been well established that there are diverse relationships between early life factors and adult health。It was thought in several previous papers that this relationships
- span a range of health outcomes which ，in some instances， manifest several decades later