由于吹填淤泥性质十分复杂，并且需要很长时间的自然沉积固结，待表面形成硬壳后方可加固处理。
However, the properties of dredged mud are very complicated and its natural sedimentation and consolidation process takes a long time.
由于是硬壳包装，电极表面聚合物膜在溶胀时体积增大，可在电极和隔离膜间形成良好的界面。
Volumes of the polymer films on the surfaces of the electrodes are increased when in swelling due to crust packaging, and a good interface is formed between the electrodes and the separation films.
火山熔岩表面似乎形成了一层硬壳。
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