截至去年十二月底，我们完成了我们的学业

截至去年十二月底，我们完成了我们的学业

結果 (英文) 1:

As of the end of December last year, we completed our studies

結果 (英文) 2:

As of twelve at the end of last year, we completed our study

結果 (英文) 3:

By the end of December last year, we completed our studies