The glue had set hard.

胶已经粘得很紧。

《牛津词典》

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。

youdao

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。

youdao

Wayne Alexander, Emory's chief cardiologist at the time, hypothesized that the same glue that adheres cholesterol to the artery wall may also set off the inflammation.

FORBES: Inflamed Hearts