代用的英文：
substitution (substit)

He softened up the plasticine with his fingers.
他用手指把代用粘土弄软了。

ersatz coffee made mostly of chicory.
主要是用菊苣做成的代用咖啡

A semisynthetic analogue of cephalosporin used especially in the treatment of respiratory and urinary tract infections.
头孢氨苄一种半人工合成的头孢菌素代用物，尤用于治疗呼吸道和尿道感染

The makeshift tent answered their purpose.
临时代用帐篷解决了他们的问题。

It lays stress on the substitution of bush material.
它重点叙述了衬套材料的代用。

a substitute; a substitution; a replacement
代替物

horn substitute
角质物

He substituted cunning for their simplicity.
他以奸滑代替了他们的直率。

There is no substitute for practical experience.
实践经验是无法替代的。

In war there is no substitute for victory.
在战争中没有什么可以取代胜利。