业余的的英文：
amateurish
extracurricular
sparetime
sunday

参考例句：

By profession a lawyer and incidentally a musician.
职业上是律师而业余是音乐家

Amateur actors often overact.
业余演员往往表演过火。

The competition is open to both amateur and professional photographers.
业余的和职业的摄影者均可参赛。

This is a picture I had exhibited at an exhibition of works by amateur artists.
这张画是我在业余画家作品展中展览过的。

Last year I worked as a part-time salesgirl on Sundays for Procter and Gamble (Hangzhou) Ltd.
去年,我利用星期天为杭州宝洁有限公司当过业余推销员。

A nonprofessional archaeologist.
业余考古学家

You are a professional, but I am amateur.
你是专职的，我是业余的。

Amateur,commercial video
业余、商业电视

I'm an amateur photographer.
我是个业余摄影师。

an amateur painter [ photographer ]
业余画家[摄影师]

amateurish是什么意思：
a. 业余的,非专门的,不熟练的
extracurricular是什么意思：
adj. 课外的，业余的

Participation in theatrical productions as an extracurricular activity.
作为课外活动的戏剧演出。

Many children engage in extracurricular dramatics.
许多小朋友参加课外演剧活动。

He took an active part in the extracurricular activities in the school.
他积极参加学校的课外活动。

sparetime是什么意思：
a. 业余的

A number of promising young swimmers were brought on at this spare-time school
这所业余学校培养了一大批有希望的年轻游泳运动员。