1977年前后，我在农场工作。
[误] About in 1977 I worked on a state farm.
[正] Around 1977 I worked on a state farm.
注：表示1977年前后，可用 around 1977 或 in 1977 or thereabouts，而不说 about in 1977。about in 后不能跟具体的年份或日期。
