[数] 有界实数集

Semiconductors, or microchips, have been changing the way the world works for the past half-century. The technology has made radios, televisions and mobile devices commonplace. In advancing the technology, researchers are now focusing on superconduct

发表于:2018-12-02 / 阅读(80) / 评论(0) 分类 2017CRI中国国际广播电台

00:05.88]weakness [00:07.41]n.1.软弱 2.缺点 弱点 3.嗜好 癖好 [00:08.93]childishness [00:10.71]n.幼稚 [00:12.49]dependence [00:14.11]n.1.依靠 2.信任 3.从属 [00:15.73]crybaby [00:17.31]n.爱哭的孩子 爱哭的人 [00:18.89]disapprove [00:20.47]vt/vi.不赞成 [

发表于:2018-12-04 / 阅读(61) / 评论(0) 分类 大学英语自学教程上

What is Bluetooth? Bluetooth is a universal radio interface in the 2.45GHz frequency band that enables portable electronic devices to connect and communicate wirelessly via short-range, ad hoc netwo

发表于:2018-12-08 / 阅读(61) / 评论(0) 分类 新概念英语第一册Flash第2版

Forcing Electrons into Superconducting Line In a study in the journal Nature researchers created a pseudo gap, in which electrons in superconducting materials line up just before flowing resistance-free. Sonya Buyting reports Imagine a world with lev

发表于:2019-01-02 / 阅读(150) / 评论(0) 分类 60秒科学

Quantum communication boasts ultra-high security as a quantum photon can neither be separated nor duplicated. It is hence impossible to wiretap, intercept or crack the information transmitted through it. Anton Zeilinger, an Austrian physicist at the

发表于:2019-01-19 / 阅读(70) / 评论(0) 分类 2016CRI中国国际广播电台

Science and technology 科学技术 Cryptography 密码术 The solace of quantum 量子之慰 Eavesdropping on secret communications is about to get harder 现在想窃听秘密联系会越来越难 CRYPTOGRAPHY is an arms race between Alice and Bob,

发表于:2019-02-24 / 阅读(76) / 评论(0) 分类 经济学人科技系列