光谱过滤由外耳。
光谱过滤：来自不同方向的声音反弹外耳的内部以不同的方式。
Spectral filtering: Sounds coming from different directions bounce off the inside of the outer ears in different ways.
本文用紫外吸收光谱法和凝胶过滤——原子吸收光谱法研究了明胶钙结合配体的特征。
In present article the feature of ligands combined with gelatin -calcium is studied by UV spectrometry and gel filter-AAS method.
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