n. 沏或泡成的浸液（如茶等）( infusion的复数形式 ); 注入, 注入物

n. a solution obtained by steeping or soaking a substance (usually in water)

n. the process of extracting certain active properties (as a drug from a plant) by steeping or soaking (usually in water)

n. (medicine) the passive introduction of a substance (a fluid or drug or electrolyte) into a vein or between tissues (as by gravitational force)