hardening
n. 硬化;淬火;锻炼
v. 硬化;使强壮(harden 的 ing 形式)
例句
Pouring concrete mixture into the sea immediately started the hardening process and rather than just dissolving in the mass of water, the substance was tough and long-lasting.
将混凝土混合物倒入大海后立即开始硬化过程,而且该物质非但不会在水中溶解,还保持坚硬耐久。