金属英语介绍

一般来说:Generally speaking:第一,金属都具有特殊的金属光泽,大部分是灰白色的,而非金属则各式各样,颜色复杂;First, the metal has a special metallic luster, most of it is gray, rather than the metal is a wide variety, color complex;第二,除了汞在常温下是液体以外,其他金属一般都是固体,而且都比较重,难熔,而非金属有很多在常温下是气体或液体;Second, in addition to mercury at room temperature is liquid, other metals are generally solid, and are relatively heavy, difficult to melt, rather than the metal has a lot of gas or liquid at room temperature;第三,金属大都善于导电传热,非金属往往不善于导电传热,所以,很多电器和锅,壶等都是用金属来做的;Third, most of the metal is good at conducting heat transfer, non metal is often not good at conductive heat transfer, so, a lot of electrical appliances and pots, pots and so on are made of metal;第四,大部分金属都可以打成薄片或者抽成细丝,如锡箔,铜丝等,而固体非金属通常很脆.Fourth, most metals can be laminated or drawn into filaments, such as silver, copper, and solid non metals are usually very brittle.当然,上面所讲的只是"一般来说",没有截然的界限.实际上,有不少非金属很像金属,又有些金属却具有非金属的性质.例如石墨的化学成份是碳,不是金属,但它却与金属一样,具有灰色的金属光泽,善于传热导电.而锑呢,它虽然是金属,却非常脆,又不易传热导电,具有非金属的某些性质., of course, the above just "in general", no completely boundaries. In fact, there are many non metal like metal and some metal has the nature of non metal. For example, the chemical composition of graphite carbon, not metal, but it with metal, with gray metallic luster, good conductive heat transfer, and antimony, it although it is metal, but very brittle and not easy to conductive heat transfer, with some properties of the non metal.但金属与非金属的根本区别是金属的电阻随着温度的升高而增大,即金属具有正的电阻温度系数,而非金属的电阻却随着温度的升高而降低,即具有负的温度系数.But the fundamental difference between metal and nonmetal is metal resistance increases with the increase of temperature, namely the metal has a positive temperature coefficient of resistance, and non metal resistance but with increasing temperature decreased, which has negative temperature coefficient.

金属的英语：metal

词汇解析

metal

英 ['metl] 美 ['metl]

n. 金属；合金；玻璃液

vt. (以金属)覆盖、装配

例句：

1、Wood floats on the water but metal sinks.

木头漂在水面上，而金属却下沉。

2、They cut holes on the sheet of metal with a punch press.

他们用冲床在金属板上打孔。

扩展资料

近义词

1、metallic

英 [mə'tælɪk] 美 [mə'tælɪk]

adj. 金属的；金属般的

例句：This is a kind of metallic paint.

这是一种有金属光泽的涂料。

2、metals

英 ['metlz] 美 ['metlz]

n. 五金

例句：Various metals are used to make the parts of this machine.

这部机器的零件是用多种金属制造的。

metal [�0�4metl]n.金属You have to file away for hours to get this metal smooth.你得锉上几个小时才能使这金属变得光滑。