But chemical mordants such as alum are popular today.
但如今明矾一类的化学媒染剂更受欢迎。
A salt, such as alum, that ionizes in solution as if it were two separate salts but forms a single substance upon crystallization.
溶解电离时好似是两种不同的盐,结晶时却构成一种物质,如明矾。
A salt, such as alum, that ionizes in solution as if it were two separate salts but forms a single substance upon crystallization.
溶解电离时好似是两种不同的盐,结晶时却构成一种物质,如明矾。
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