at the expiry

基本解释

If, at the expiry of such a time limit, the requirements arestill not satisfied, the licence shall be definitively withdrawn.
如期满后要求仍未得到满足，则执照将被正式吊销。
The total amount so retained shall be paid to the Supplier by the Purchaser at the expiry of the guarantee period.
所保留的总金额应在保修期终止时由买方付给供方。
ntcfy.com
Repayment of Investment Funding principal in full at the expiry of the Full Term of Agreement is assumed in the absence of such Repayment Schedule.
在没有还款计划时间表的情况下，（借贷方）与（资金方）双方均共识本协议总协议年期到期后贷款本金及其最后一年的利息一并偿还。

If FTSE is above 6000 at the time of the option expiry calls at 5800 or 5900 will offer the maximum payout.
FORBES: Optional Opportunity
That leaves one, rather distant, hope: that, in the lame-duck period between the election and the next Congress, prompted by the imminent expiry of George Bush's tax cuts at the beginning of 2013, America's politicians will sit down and finally hammer out the grand bargain the country so desperately needs, with the tax increases delayed in exchange for sensible reforms to spending and the tax code.
ECONOMIST: America’s fragile recovery
In any case, throwing out the suit helps remove the worst-case scenario for Pfizer, and makes it more likely that the Lipitor patent expiry could actually lead to an upside earnings surprise at the end of the year, as detailed here.
FORBES: Judge Tosses Mylan Lipitor Suit, Misses The Point