传统的气敏材料测试方法仅仅测试材料在与气体接触前后电阻的变化，只能反映气体吸附的结果，而不能反映吸附和解吸的动态过程。
The general measurements record only the change of materials' resistance before and after meeting gases. It reflects only the results, not the dynamic process of adsorption.
哈利看了看罗恩和赫敏，他俩的表情反映出他所感到的震惊与感激。
Harry looked at Ron and Hermione; their expressions reflected the mingled shock and gratitude he felt.
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