- 重点词汇
- usuallyadv.通常,经常,平常,惯常地;一直,向来;动不动,一般;素;
- negativeadj.消极的;否定的;负的;阴极的 ;
- theart.这个;指已提到或易领会到的人或事物;指独一无二的、正常的或不言而喻的人或事物;用以泛指;与形容词连用,指事物或统称的人;用于姓氏的复数形式前,指家庭或夫妇;(指特定用途的事物)足够,恰好;每,一;当前的,本,此;(重读,表示所指的为知名或重要的人或事物)
- arevi.(用于第二人称单复数现在时,第一、三人称复数现在时)是;
- nucleusn.(原子)核 ;(组织的)核心,中心;
- positiveadj.积极乐观的;建设性的;拥护的;正面的;明确的;有把握的;阳性的;完全的;大于零的;带正电的;
- isvt.& vi. 是(be的三单形式);
- electronsn.电子( electron的名词复数 );
- 相关例句
As it approaches the ground, positively charged particles are attracted upwards.
在它接近地面时, 正电的电粒子被吸引得向上而行.
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The other kind of electricitypositive electricity. Its ultimate particles are called protons.
另一种类型的微粒带正电, 我们把这种终极微粒称为质子.
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Thus, glass becomes positive, while the silk with which the glass was rubbed becomes negative.
例如, 玻璃与丝绸摩擦时,玻璃带正电, 而丝绸带负电.
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Version B : Proton is positive , election negative and neutron neither.
例7.质子带阳电, 电子带阴电,而中子既不带阳电也不带阴电.
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阿迪达斯公司称, 他们在制造 “ 飞火流星”时, 使用的是复合泡塑料以及独特的拉歇尔经编针织物.
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The old seaman called for a glass of rum and stood outside, drinking and looking around.
老海员要了一杯朗姆酒,站在客店外面, 一边喝酒,一边向四周观望.
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And about the same time, a carriage driving up to the inn, she took her departure.
差不多就在同时, 一辆马车赶到客店门口, 她就动身离去.
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He stopped at a little inn close by the market place, and asked for lodging.
他的市场附近的一家小客店门前停下来, 要求投宿.
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