adj.& adv.<英>两星期(发生、出现)一次的[地],每两周的[地]
n.双周刊
Meetings take place at fortnightly intervals.
每两周开一次会。
They recently put my rent up and I pay it fortnightly.
他们最近涨了租金,我就每两周付一次房租。
Unemployment benefit is paid fortnightly in arrears.
失业救济金延后两个星期支付。