-- distinguished from transubstantiation, which supposes a miraculous change of the substance of the elements
One who supposes.
pre-supposes
(pre-suppose 的第三人称 -s形式) vt. 假定;预料;以…为先决条件
presupposes
v. 预先假定( presuppose的第三人称单数 ); 假设; 以…为先决条件; 意味着