Vocation和Avocation都有“职业”的含义。

Vocation：a type of work or way of life that you believe is especially suitable for you 工作，职业，生活方式。常指赖以为生的正业、主业（principal works）。

Avocation：a hobby or other activity that you do for interest and enjoyment 业余爱好。强调指副业（subsidiary business）。

副业的几种表达方式：

Sideline

Avocation

subsidiary business

part time business

参考双语例句：

He was a printer by trade and naturalist by avocation.

他在印刷厂工作，同时是个博物学爱好者。

The six "grieving" scenarios widely circulating on the Internet recently are: men get unemployed, women have to engage in sideline businesses, students fail to graduate, shops have to close down, money laundering becomes a profession and funeral parlours open one after another.

最近网上流传六大惨业，即男人失业、女人经营副业、学生毕不到业、店铺结业、大耳窿成为专业、殡仪馆不停开业。

In the current budget the Government of Belize made some important provisions to ensure access to education including $3 million in scholarship grants for the first year of high school, $1.5 million in scholarship grants for tertiary education, $2 million for the supply of textbooks to primary school students, an increase of $1.5 million to the University of Belize and $3million for the completion of the enhancement of the Technical, Vocation and Education Training project.

在现行预算中，伯利兹政府拨出了几笔数额相当大的预算，以确保获得教育，包括中学第一年奖学金300万美元，高等教育奖学金150万美元，向小学生提供课本200万美元，对伯利兹大学增加拨款150万美元，为完成增强技术、职业和教育培训项目而拨款300万美元。

Lastly, the Convention on the Rights of Migrant Workers and Members of Their Families provides entitlements for rural women to access education and vocation training as well as protection against the use of misleading information related to migration, trafficking, or unfavourable conditions of employment and remuneration.

最后，《移徙工人及其家庭成员权利公约》规定，农村妇女有权享有教育和职业培训，并且得到保护，免受关于移徙、人口贩运或条件不良的就业和报酬 的信息误导。

来源：译问