[rù mén]
(初步学会) cross the threshold; learn the ABC of; ushered into a subject; learn the rudiments of a subject
He has just learned the rudiments of Chinese.
他学汉语刚刚入门。
I don't even know the ABC of the subject yet.
我还没入门呢。
He is the master who initiated me into the craft.
他是我的入门师傅。
To cross the threshold is not difficult, but mastery is another question.
入门不难,深造不易。
(指初级读物; 基本知识) elementary course; ABC; guide
The ABC of Photography
《摄影入门》
Elementary English Grammar
《英语语法入门》