Garrison nodded, hoping Pa wouldn't say that he was too old to be fooling around with pencils and paper.
加里森点了点头，希望爸爸不会说他年纪太大了，不能再摆弄铅笔和纸了。
All he had left now was a sheet of the beautiful brown paper Pa had brought back from his last sailing trip.
现在他只剩下一张爸爸上次航海旅行带回来的漂亮的牛皮纸。
The paper introduced a way of produce nanometer organic clay. It was one of materials , with which can producing nanometer PA .
本文介绍了生产纳米尼龙的原料之一纳米有机膨润土的制备方法。
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