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[00:04.10]3.While you listen [00:10.58]Recommending a website [00:14.94]You are going to listen to a conversation between two friends who meet in the street. [00:22.02]Are you booking your summer holiday already.then? [00:29.15]Oh.hello.Simon.I didnt
This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? Engineers are always plugging away to get better energy efficiency out of our products -- like cars that guzzle less gas or light bulbs that burn brighter on f
Engineers are always plugging away to get better energy efficiency out of our products -- like cars that guzzle less gas or light bulbs that burn brighter on fewer watts. But even if we replaced all today's bulbs with energy-sipping LEDs, the world m
Lesson 39: [00:03.68]Clean Cars?To:Li-Ming@net.cn [00:11.05]Subject:New Fuel for Cars [00:16.20]From:jenny@compmail.ca [00:22.57]Date:08/05 4:33 PM Hi,Li Ming [00:31.03]This week in school,We studied transportation. [00:37.20]We learned about trains,
Science and Technolgy. 科技。 Visible-light communication. 可见光通信。 Tripping the light fantastic. 与光共舞。 A fast and cheap optical version of Wi-Fi is coming. 一个高速而廉价的光学Wi-Fi即将问世。 AMONG the many new
Science and technology 科学技术 Visible-light communication 可见光通信 Tripping the light fantastic 与光共舞 A fast and cheap optical version of Wi-Fi is coming 一个高速而廉价的光学Wi-Fi即将问世 AMONG the many new gadgets u