Opening: a job that is available 空缺的职位
There are several openings in the sales department.
销售部有几个空缺.
Field: a particular subject or activity that somebody works in or is interested in 专业;学科;界;领域
famous in the field of politics/science/music
政界/科学界/音乐界著名的
All of them are experts in their chosen field.
他们在各自选定的专业中都是专家.
This discovery has opened up a whole new field of research.
这个发现开辟了一个崭新的研究领域.
Hunting: the process of trying to get a job or find a house to buy or rent 找工作;找房子
How's the job hunting going?
工作找得怎么样了?