Seawater, however, is alkaline. This alkalinity causes the glue to set.
然而，海水带有碱性，这种碱性就导致了胶质的聚合。
Seawater, however, is alkaline. This alkalinity causes the glue to set. It solidifies into a foam within 30 seconds and becomes a flexible, leathery substance over the course of several hours.
碱性的海水使得胶质在30秒内凝结为泡沫，并在几小时内变为柔韧的皮状表面。
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