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冠词的特殊位置（续）
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（2）how(多么) so(如此) too(太) +形容词+a/an +单名 as(如此)[它属于as…as句型] We must determine how large a force is required to lift this stone. This is so large a number. That is too small a current. China has several times as large an area as France. This refers to(涉及到) too large a class of circuits(电路)
![（2）how(多么) so(如此) too(太) +形容词+a/an +单名 as(如此)[它属于as…as句型] We must determine how large a force is required to lift this stone.](http://slidesplayer.com/slide/15001303/91/images/2/%EF%BC%882%EF%BC%89how%28%E5%A4%9A%E4%B9%88%29+so%28%E5%A6%82%E6%AD%A4%29+too%28%E5%A4%AA%29+%2B%E5%BD%A2%E5%AE%B9%E8%AF%8D%2Ba%2Fan+%2B%E5%8D%95%E5%90%8D+as%28%E5%A6%82%E6%AD%A4%29%5B%E5%AE%83%E5%B1%9E%E4%BA%8Eas%E2%80%A6as%E5%8F%A5%E5%9E%8B%5D+We+must+determine+how+large+a+force+is+required+to+lift+this+stone..jpg "This is so large a number. That is too small a current. China has several times as large an area as France. This refers to(涉及到) too large a class of circuits(电路) .")
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Even so fundamental(基本的) a dimension(量纲) as time was measured(测量)extremely(极其) crudely(粗糙地) with sand and water clocks hundreds of years ago. Too low a frequency(频率) may actually(实际上) introduce(引起) spurious(寄生的) frequency components(分量).
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思考题： 1、英译汉 Two parallel(平行的) rubber bands(橡皮筋) provide(提供) twice(两倍) as large a force(力) as one rubber band (does). 2、汉译英 数字传输(digital transmission)不需要像模拟(analog)传输那么高的信噪比(S/N ratio)。
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Digital transmission need not/does not need as high an S/N ratio as analog transmission.
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