单词:packaged vacuum pump system
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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
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
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
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
Todd: So, Simon, are you still planning to take trip to Southeast Asia? 托德:西蒙,你还在计划去东南亚旅行吗? Simon: Yeah, I really like Southeast Asia so I would like to go there again. 西蒙:对,我真的非常喜欢东南亚
Todd: So, Simon, are you still planning to take trip to Southeast Asia? Simon: Yeah, I really like Southeast Asia so I would like to go there again. Todd: Oh, cool. When you go, are you taking a tour, packaged tour or are you just going to go on your