preparation可数吗

preparation preparation单复数用法

preparation词组？酶制剂的制备方法。preparation用法？准备是与动词prepare对应的名词形式，意思是准备。作主语、宾语、谓语等。preparati...

2021-03-16 02:19:36 preparation单复数用法 preparation可数吗 preparation搭配用法