单词：silica scum
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Plant Self-defense Plants may appear to be helpless in the face of hungry,toothy animals but many plants have evolved interesting systems of self-defense. Coarse meadow grasses are a good example. If you run your finger along a blade of coarse grass,
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AS IT IS 2015-07-14 Silica Sand Mining Worries Communities 美国硅砂矿引发社区担忧 The United States is increasing production of oil and natural gas through a process known as fracking. This process is sometimes called hydraulic fracking be
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AILSA CHANG, HOST: Despite mounting evidence and a stream of dire warnings, federal regulators and mining companies failed to protect coal miners from toxic dust. MARY LOUISE KELLY, HOST: NPR and the PBS series Frontline spent more than a year lookin
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Topics: Dates for dogs, Me, too!, Something 101, Im game, to hover over, travel vs. trip vs. journey, up to vs. until, Word up! Words: to bound into play date a dog of (something) to be pampered empty-nesters Me, too! (Something) 101 to be game to ho
美语听力 English Cafe
加拿大当红的朋克团体Hawk Nelson发片，新专辑的歌曲依然是如此朗朗上口，旋律优美难忘。作为一支商业乐队，Hawk Nelson在音乐上从不输人，无论是乐队形象还是封面设计，这支乐队健康向上的
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