變硬的用法和樣例：
例句
-
固定劑進(jìn)行微觀(guān)考察時(shí)用的一種保護和使新鮮組織變硬的溶液
A solution used to preserve and harden fresh tissue for microscopic examination. -
在水中變硬的能在水下定型并變硬的，如波特蘭水泥
Able to set and harden under water, as Portland cement. -
變硬的滯流熔巖
A hardened lava flow. -
清漆幾分鐘就能變硬。
The varnish takes a few minutes to harden.
