There are two main causes of cancer: heredity and environment. We can do nothing to change our heredity, that is, the basic physical characteristics that were passed on to us by our parents. However, we can do a GREat deal to control our environment, which may account for 80-90 %of all cancers.
Environmental pollution can be divided into two kinds: personal and impersonal. Personal pollution may be defined roughly as unhealthy habits such as smoking, drinking, and eating the wrong foods. Clearly, with enough will power we can control this personal environment.
Impersonal pollution, on the other hand, refers to those things which are beyond our individual control. One example would be industrial pollution, which is very hard to control because of the expense involved. It would be expensive in terms of profits and perhaps jobs. The American automobile industry, for example, resisted the law requiring smog-control devices because it feared the added expense would reduce profits. Nevertheless, some laws protecting the environment have been quite successful in reducing pollution.
每日雅思词汇:传统中式小吃
每日雅思词汇:中国传统饮食
每日雅思词汇:“室内设施”相关表达
每日雅思词汇:中式零食
每日雅思词汇:英语里”oo”的用法
每日雅思词汇:中国现代特色的表述
每日雅思词汇:个人简历常用词
每日雅思词汇:“布艺家纺”的表达
每日雅思词汇:各种“饭”
每日雅思词汇:“工作目标”相关词汇
每日雅思词汇:果汁的相关表达
每日雅思词汇:“教育程度”的表达
雅思常考十种场景词汇:学校生活
每日雅思词汇:与"coffee"相关的短语
每日雅思词汇:判决的表达
雅思听力场景词汇:考古场景
每日雅思词汇:魔鬼动词“put”用法汇总
雅思分类词汇:描述城镇的词汇
每日雅思词汇:各种面食的表达
雅思听力场景词汇:旅游场景
每日雅思词汇:英语中的易混词汇
每日雅思词汇:中国新兴事物
每日雅思词汇:中国古代独特事物
每日雅思词汇:校职工词汇
每日雅思词汇:特色中餐
每日雅思词汇:各种业余爱好
雅思分类词汇:服装词汇
每日雅思词汇:日常生活用品
每日雅思词汇:“spring”的相关表达
每日雅思词汇:“室内家具”词汇
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