单词:component usage designator
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Surprising Origin of 'To Keep at Bay' Now, it's time for Words and Their Stories from VOA Learning English. On this program, we explore everyday expressions that we use in conversation. Americans often use the first saying we will talk about today. B
Passage Transcript biochemistry is a very specific area of chemical science which, studies the interactions of biological systems with chemical components, and which also determines, which chemical components and, how interacts with the human body an
What do you do when you have time to kill? It's a bit of a violent phrase, isn't it? It really means to use up spare time, or extra time. That is just(1) what I was doing this weekend, while I was waiting for my son's basketball game to start. We had
Johannesburg Leads Africa in Twitter Usage 推特使用方面南非冠绝非洲 From VOA Learning English, this is the Tech Report. 这里是美国之音慢速英语科技报道。 Johannesburg is tweeting up a storm. The South African city leads the
New design produces flexible panels using only 1-2 percent as much silicon Art Chimes | Washington, DC 19 February 2010 You can use 100 times less silicon. And that's potentially very significant. Harry Atwater Schematic diagram of the light-trapping
Dictionaries range broadly in purpose, size, and price; and choosing one is a very personal decision. The best advice is to make note of the things you and your family look up in a dictionary over a few weeks' time, and then go to a comprehensive boo