行当的英文：
profession; trade

参考例句：

He is in the secondhand car trade.
他是从事旧汽车贸易行当的。

I found myself in the psychoanalysis racket.
我发觉自己适于做精神分析行当。

Fishing has been a profitable industry lately.
捕鱼近来成了一项赚钱的行当。

The only service I can do to my profession is to serve as a flea
我在这个行当里做的就是跳蚤的工作。

The business or practice of hunting, killing, and processing whales.
捕鲸及提炼鲸油业猎获、杀死及加工鲸鱼的行当

Having played ducks and drakes with his own money, he wanted to play the same silly game with mine.
他在把自己的钱挥霍完以后，又要拿我的钱去干那些傻行当。

He soon abandoned its practice and went to New York to embark on a literary career
于是他很快就与这一行当分道扬镳，到纽约开始了笔墨生涯。

They put in place the tools of my new business.
他们把我干这一新行当所需要的用具安放得井井有条。

profession是什么意思：
n. 职业；同业，同行；声明；表白

His profession is a teacher || He is a teacher by profession
他的职业是教师

The author of the guidebook is an architect by profession.
该手册的作者任职建筑师。

The author of the guidebook is an architect by profession
该手册的作者任职建师

It's a hybrid between a production profession like tailoring and the service profession of enchanting.
它是制造业比如裁缝和服务业比如附魔的混合体。

The character, condition, or profession of a monk; monasticism.
修道修道士的身份、状况或职业；僧院制度

trade是什么意思：
n. 贸易；生意；交换；职业；手艺
v. 交易；对换；用…进行交换

Jack of all trades is of no trade
万事皆通,一无所长

the trade in pornography
色情作品的交易.

Foreign trade departments handle export and import trade.
外贸部门经营进出口业务。

custom of foreign trade.
对外贸易惯例

A businessperson engaged in retail trade.
从事零售交易的商人。