灰尘
word C2- dust
Its characters
From the library
我这时突然感到一种异样的感觉，觉得他满身灰尘的后影，刹时高大了，而且愈走愈大，须仰视才见。
但两手刚触着门，却又觉得未免太暴躁了，就歇了手，只放下那积着许多灰尘的门幕。
首先，树木能够吸收灰尘、降低噪音，夏天还能为街道遮阴，使周围的气温下降好几度。
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