副业的英文：
(n) sideline occupation; pastime

参考例句：

He is a doctor by profession and a novelist by avocation
他的职业是医生，副业是作家。

They raise ducks as a sideline.
他们以养鸭为副业。

They raise ducks as by-line.
他们以养鸭为副业。

The professor runs a restaurant on the by-line.
这位教授开了一家饭店作为副业。

"Joe is an engineer, but he does some translation as a sideline."
〞乔是工程师,但作为副业他也从事一些翻译。〞

Sideline teams have begun to keep milk cows, pigs and chickens.
副业队已开始饲养奶牛、猪和鸡。

He runs a profitable sideline selling postcard to tourist.
他在干一个有收益的副业－－－－向游客出售明信片。

sideline是什么意思：
n. 副业；球场边线；局外
v. 使退出

The player was sidelined with a sprained ankle.
这运动员因踝部扭伤而退出。

(in football and Rugby)part of the pitch outside the sidelines
(足球及英式橄榄球)边线以外区域

I asked the spectators to keep back from the sideline.
我要求观众们不要走近边线。

occupation是什么意思：
n. 占领；使用，占用；工作；消遣

impaired occupant
有残疾的占用者

He is a merchant in occupation.
他的职业是经商。

Riding is her favorite occupation.
骑马是她最喜欢的消遣。

pastime是什么意思：
n. 娱乐，消遣

Baseball is the national pastime.
棒球是全民性的休闲运动。

Speculation as to the desirability of this process is an unprofitable pastime .
猜测这一进程有何可取之处是无益之举。

She shared their expatriation, their convictions, their pastimes, their ennui
她与他们有共同的流亡国外的命运，共同的信念，共同的乐趣，共同的苦闷。