单词：vacuum backing pump
单词：vacuum backing pump 相关文章
She inspected the carpet for small items. She saw a paper clip and a rubber band. She picked them up. She put them into a little box on the kitchen counter. She plugged in the vacuum cleaner. She turned on the switch. The cat ran out of the room. She
原版英语小短文
This is Scientific American 60-Second Science. I'm Cynthia Graber. This will just take a minute. The fridge is one of your home's biggest energy hogs. Better insulation can make refrigerators much more efficient. And a panel encasing a vacuum is one
Scientific American(五)月
注释： oppose [E5pEuz] vt. 反对 opinion polls 民意调查 mission [5miFEn] n. 使命，任务 upsurge [Qp5sE:dV] n. 高潮 intimidate [in5timideit] v. 胁迫 shake [Feik] v. 动摇 thug [WQ^] n. 暴
VOA2004（上）--各类新闻
今天要学的一个词是：pump。pump，Pump一般是指泵，或抽水机。可是今天讲的pump是指汽车加油站的泵。英国石油公司宣布停止在阿拉斯加的石油开采，《洛杉矶时报》的标题说：Oilfield Closure t
英语单词荟萃
今天我们要学的词是 backing. Backing 做为名词，是支持的意思。The obesity drug named Qsiva failed to gain the backing of European drug regulators because of its potential side effects. 一种名叫Qsiva的治疗肥胖症的药物，因
英语单词荟萃
CAPE CANAVERAL Two American astronauts will venture outside the International Space Station Monday to stow a failed coolant pump and extend the outpost's Canadian railway. Wearing protective spacesuits in a deadly vacuum(真空) environment, Stephen
英语新闻