24小时热门版块排行榜

>论坛更新日志 (3984)
>虫友互识 (482)
>导师招生 (383)
>找工作 (283)
>职场人生 (242)
>论文投稿 (214)
>文献求助 (170)
>考博 (136)
>考研 (103)
>博后之家 (81)
>休闲灌水 (75)
>医学 (61)
>学术会议 (53)
>硕博家园 (48)
>招聘信息布告栏 (45)
>有机交流 (27)

返回列表

当前主题已经存档。

当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖

lidangjun

金虫 (小有名气)

应助: 0 (幼儿园)
金币: 718.5
帖子: 138
在线: 52小时
虫号: 282736
注册: 2006-09-24
性别: GG
专业: 无机材料化学

[交流] 自己写的一篇小文，请各位大侠拍砖！

There is a paradox between knowledge and ignorance. As John Kennedy said, the greater our knowledge increases, the greater our ignorance unfolds. Our knowledge could be described by a small circle, and ignorance is the space outside the circle. When circle expanded, meaning knowledge increased, more scope of ignorance is touched, and thus ignorance grew as well.
An example: CFCs, who is also named as Freon, were discovered in the early 1930s and are widely used for many kinds of industrial, commercial, and household applications after World War II because of its safety characteristics. It has been used extensively as fridge coolant, solvents, and hair mousse. Not until early 1970s was CFCs found to be a potentially destruction to ozone layer. But conclusive evidence of ozone loss was not discovered until 1984. By 1990 CFCs had made a general thinning of the ozone layer worldwide. It has posed a serious environmental threat now. With the discovery of CFCs our knowledge increased, but ignorance also increased.
Ignorance is not a solvable problem, but rather an inescapable part of the human development. The advance of knowledge always carries with the advance of some form of ignorance.

回复此楼