单词：Wood's filter
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远离尘嚣
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
365个英语简短小故事
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
2018年VOA慢速英语(一)月
Every year, either in the summer, or around October, we make a trip to Smallwood's Farm. It is a family-run farm with a petting zoo. All of the produce grown on the farm is sold directly to the public. Through the years, it has grown from a small att
英语博客 A cup of English
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
2007年VOA标准英语（五月）
The Oyster's Mighty Comeback Is Creating Cleaner U.S. Waterways ELISE HU, HOST: Oyster farms are rapidly sprouting up along America's eastern shoreline. Production doubled in just the past six years, driven by the farm-to-table movement. As Delaware
2016年NPR美国国家公共电台8月