年；日历年the period from 1 January to 31 December, that is 365 or 366 days, divided into 12 months
in the year 1865
在 1865 年
I lost my job earlier this year.
Elections take place every year.
The museum is open all (the) year round(= during the whole year) .
一年时间a period of 12 months, measured from any particular time
It's exactly a year since I started working here.
She gave up teaching three years ago.
in the first year of their marriage
the pre-war/war/post-war years(= the period before/during/after the war)
I have happy memories of my years in Poland(= the time I spent there) .
与某事相关的一年；年度a period of 12 months connected with a particular activity
the academic/school year
the tax year
年级；某年级的学生a level that you stay in for one year; a student at a particular level
We started German in year seven.
a year-seven pupil
The first years do French.
She was in my year at school.
年岁；年纪；年龄age; time of life
He was 14 years old when it happened.
这件事情发生的时候，他 14 岁。
She looks young for her years.
They were both only 20 years of age .
他们两人都只有 20 岁。
a twenty-year-old man
He died in his sixtieth year.
She's getting on in years(= is no longer young) .
很久；好长时间a long time
It's years since we last met.
They haven't seen each other for years .
That's the best movie I've seen in years .
We've had a lot of fun over the years .