单词：substitutional solid solution
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This is the VOA Special English Agriculture Report. A round barn in Illinois American farmers traditionally keep their animals and equipment in barns that are rectangular. But there are hundreds of barns in the Midwest and other parts of the country
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This is the VOA Special English Agriculture Report. A round barn in Illinois American farmers traditionally keep their animals and equipment in barns that are rectangular, longer than they are wide. But as many as one thousand barns in the Midwest a
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He bought a DVD player. He went home. He unplugged the old DVD player from the living room flat-screen TV. He hooked up the new player. He plugged the old player into the 10-year-old TV in the bedroom. His wife came home. She said, Why didn't you jus
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