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scratch-抓,刮,擦,刻划 screen -屏幕,荧幕 screw -螺丝 script -剧本,广播稿 seal-封条,图章 secondary -次要的,第二的 sector -扇形,部门,战区 secure -安全的,可靠的 segment-部份,断片 select -选择,挑选 selfish -自私的,利己的 semester -学期 semiconductor-半导
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Unit 13 screen script seal secondary secure security segment segregate select senior sensation sensible sensitive sequence series session settlement severe shallow shave shed sheer shelter shield shift shiver shock shortage shortly shove shrewd shri
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But the HEPA filter for Olivers Vibe got dirty very quickly. And, it was not cleanableit was simply replaceable. When it turned filthy brown, Oliver went back to Target to buy a new filter. Oddly, Target sold the F15 belt for the Vibe, but not the fi
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[0:0]scratch抓，刮，擦 [0:9.1942]screen screw script seal屏幕，银幕 螺丝 剧本，广播稿 封条，图章 [0:46.5236]secondary sector secure segment次要的，第二的 扇形，部门 安全的，可靠的 部分，断片 [1:34.3195]select selfish semester semiconductor选择，挑选
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From VOA Learning English, this is the Health Lifestyle report. In parts of India, it is not uncommon to see people wearing a mask over their nose and mouth. The capital, New Delhi, has some of the world's dirtiest air. The pollution was a call for a
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By Tabinda Naeem Washington, D.C. 21 May 2007 Two years ago, the National Academy of Engineering established the Grainger Challenge Prize for Sustainability. This $1 million award was designed to challenge the world's scientists to develop a practica
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