conduction 1. 【物】传导 2. 输送insulator 1. 从事绝缘(隔离)工作的人2.【电】绝缘体connection1. 连接;联络;衔接[C][U][(+with/between)]The connection of our telephone took several hours.我们用了好几个小时才接通了电话。2. 关系,关联[C][U][(+with/between)]Trade connections existed between the two countries before the war.战前两国之间有过贸易往来。3. 接驳转运的火车(或船,飞机等)[C]The train was late and I missed my connection.火车晚点了,我未能转上车。4. 亲属,姻亲;社会关系[C][P1]He is a distant connection of my wife's.他是我妻子的一个远亲。5. (业务上的)客户;(可资利用的)熟人[C][P1]She's just a business connection.她只是我的一个客户。6. 亲属关系;业务往来[C][U]The company has connections with a number of Japanese firms.这家公司与几家日本商号有业务往来vacuum1. 真空[C]We could not pull apart two plates which enclosed a vacuum.如果两个盘子间是真空,我们就无法将它们分开。2. (心灵的)空白,空虚[S]Her husband's death left a vacuum in her life.她丈夫的死使她的生活变得空虚。3. 真空吸尘器;真空装置[C]The porter turned off the vacuum.清洁工关掉真空吸尘器。4. (跟外界隔绝的)孤立状态[C]Some people are living in a vacuum.有些人过着与世隔绝的生活。vt.1. 【口】用真空吸尘器清扫[(+out)]I vacuumed my room yesterday.昨天我用吸尘器清扫了房间。radiation1. 发光;发热;辐射[U]2. 辐射能;放射线,放射物[C][U]This apparatus produces harmful radiations.这个装置产生有害的放射物。3. 发射;传播[U]4. 【生】辐射形进化[U]wavelength1. 【物】波长[C]2. 【广播】波段[C]What wavelength is this station on?这个电台在哪个波段?I can't get this radio station any more. Maybe its wavelength is jammed.我再也找不到这个电台了。可能这个波段被干扰了。amplitude1. 广大,广阔2. 充足,丰富3. 【物】振幅4. 【军】射程frequency1. 频繁,屡次[U]Accidents are happening with increasing frequency.事故正在愈加频繁地发生。2. 频率,次数[C]the frequency of death死亡频率3. 【物】频率;周率[C][U]This radio station broadcasts on three different frequencies.这家电台以三种不同的频率广播。reflection1. 反射;回响;反射光,回声[U]the reflection of a sound wave声波的反射2. 映象,倒影[C]The deer gazed at its reflection in the forest pool.鹿凝视着它倒映在森林水池里的影子。3. 反映;表达,抒发[C]4. 容貌酷似的人;惟妙惟肖的事物[C]The girl is a reflection of her mother.那女孩长得和她母亲一模一样。5. 深思,熟虑;反省[U][(+on/upon)]After long reflection we decided to buy the house.经过很长一段时间的慎重考虑,我们决定买下那所房子。6. 想法,意见[C][(+on/upon)][+that]7. 非议;(对名誉、品格)有损的事[C][(+on/upon)]Children's bad behavior is often a reflection on their parents.小孩的坏品行常常有损父母的名誉。Your accusation of my lying is a reflection on my reputation.你说我撒谎,这有损我的名誉。rellaction 没这个词spectrum1. 【物】谱;光谱They could look at the spectra of the light the moons reflected.他们可以观察月亮反射的光的光谱。2. 【电信】频谱;射频频谱3. 【电】电磁波谱4. 系列;范围;幅度[(+of)]There is a wide spectrum of opinions on this question.在这个问题上有着各种不同的意见。5. 【心】余象prism1. 【数】棱柱(体),角柱(体)a triangular prism一个三棱柱2. 【晶】棱柱3. 【物】棱镜4. 折光物体
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