改变世界的17种物质_BEC初级作文_BEC初级-查字典英语网

改变世界的17种物质

很难想象发明肥皂之前的人类生活中充斥着怎样的气味。而更好的卫生习惯也极大阻碍了疾病的传播。作为肥皂的重要组成部分，硬脂酸钠其魔法般的工作原理在于可以把油脂溶解在水中。据联合国儿童基金会统计，用肥皂洗手的行为每年可以让一百四十万人免于因严重呼吸道疾病而死亡。

SILICON — Si

In 1954 the first silicon transistor initiated what has become a A$160 billion global market in semiconductors. Silicon is a key component of computer chips and circuits and it's estimated that there are currently more than one billion computers in use worldwide. Silicon is also used in solar cells, waterproofing treatments and seals, explosives and breast implants.

硅Si

从1954年第一个硅晶体管诞生开始，现在已经发展为价值一千六百亿美元的半导体产业。硅是计算机芯片和电路的关键部件，据估计，目前全世界有超过十亿台计算机。另外，硅还被用于太阳能电池，防水密封，炸药以及胸部填充。

RUBBER — C5H8

Natural rubber has been gathered from the sap of plants for centuries. But rubber only began to be used widely after 1839, when Charles Goodyear found a way to make it strong, durable and elastic. In 1931 U.S. chemist Elmer Bolton developed a synthetic version, and in 2005 we produced 21 million tonnes, with tyres and tubes accounting for 56 per cent of consumption. Other applications include gloves, rubber bands and balloons. Even some rockets and missiles are powered by synthetic, rubber-based fuels.