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and hang it point downwards from a strip of wood placed across the top of a wide-mouthed bottle, or a pickle-glass, or a tumbler, half full of water. 然后尖头朝下悬挂在一片横放在装有半瓶水的宽口瓶、泡菜瓶或平底玻璃杯口
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桂皮是什么? 桂皮又称肉桂、官桂或香桂，为樟科植物天竺桂、阴香、细叶香桂、肉桂或川桂等树皮的通称。本品为常用中药，又为食品香料或烹饪调料。商品桂皮的原植物比较复杂，约有十余
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This is the VOA Special English Agriculture Report. A beetle invasion in the United States has killed at least twenty million ash trees. The invasion of the emerald ash borer was first discovered near Detroit, Michigan, in two thousand two. Experts b
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The bark of the cork-tree is first stripped off its trunk when the tree is about thirty years old. This bark is very rough and full of cracks. It is called virgin cork, and it is used to decorate green-houses and flowerboxes. 木栓栎树长到30年的
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