According to the specified observation data, it found that the magnetic declinations on airdrome runway varied greatly; therefore, it couldn't reflect the real condition for the airdrome whole area.
机场运行需要跑道上的磁偏角，但本次实际观测数据表明，机场路道上的磁偏角因受机场环境影响，不同地方变化很大，不能反映机场整个区域的实际情况。
According to currently this teaching present condition origin the text lay claim to should know how to handle classroom observation of method construction or purchase real results language classroom.
基于目前这一教学现状本文主张应善用课堂观察的方法建构起实效性的语文课堂。
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