a twelvemonth
for a twelvemonth
over a twelvemonth
A: How long was the construction period?
A：施工周期有多长？
B: It took a twelvemonth to finish.
B：花了一年的时间才完成。
1) 一年
2) 十二个月的期限
1. 一年
noun
1. A period of twelve months; a year.
Synonym: year