"门外汉(ménwàihàn)" refers to those who are lacking or not familiar with the knowledge in one specific field.
例句 Sentences
1、谈到摄影,我只不过是个门外汉。 Tándào shèyǐng ,wǒ zhǐbúguò shì ge ménwàihàn . Where the photography is concerned, I am only a layman.
2、他一直努力学习英语,从一个门外汉慢慢变成一个英语专家。 Tā yìzhí nǔlì xuéxí yīngyǔ, cóng yíge ménwàihàn mànmàn biànchéng yíge yīngyǔ zhuānjiā. He started from the very beginning and now becomes an expert in English because of his persistence and hardworking.