dp72893325
和它连用的东西不同意思则不同 In four years’ time四年以后in the past four years, you were in prison, on parole or on probation for a year or more在过去的四年中For four years in a row连续四年;持续四年Bob's father,who worked on the project,spent four years in Egypt鲍勃的父亲从事这项工程