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本讲为 2006 年下半年新的教学内容,请对照教材,练习册和语法书听录音! 1. They also load and unload hot, heavy metal forms used in machines casting automobile and truck fr
Light might make you a lightweightin a good way. Its been known that bright light in the morning can reduce appetite and body weight. But that fact did not prove that light has a direct effect on weight. Early morning exposure to light could just be
The deep ocean has other sources of light than astronomical bodies, though. 除了天体,深海还有其他光源。 Three-quarters of marine organisms off the coast of California produce their own, and that is probably true in most oceans, 加利福
BEIJING, Feb. 28 (Xinhua) -- Construction began on China's first low-speed maglev(磁力悬浮火车) line Monday in Beijing, a project that will make China only the second country with a low-speed maglev line after Japan. The project marked China's