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1·The challenge will be to simulate these reformable bonds in man-made adhesives.

这些挑战将被改造模拟债券人造粘合剂。

2·Quartz grain surface textures in coastal dune sand which is mainly derived from beach sand have features characteristic of both typical aeolian environment and inheritable and reformable beach sand.

本文通过对广东和海南海岸沙丘砂石英颗粒的扫描电镜分析，认为其表面结构特征，既具有典型的风成环境特征。