紧急通知(英国政党领袖要求其议员必须参加投票和如何投票的书面通知) (in Britain) a written notice to Members of Parliament from their party leaders telling them that they must be present at a particular vote and must vote in a particular way
N-COUNT(要求某政党议员参加议会并按照要求就某议题投票的)紧急指令 A three-line whip is a situation where the MPs in a political party are ordered to attend parliament and vote in a particular way on a particular issue.
First , it exposed the scale of Euroscepticism in the Tory party : 81 of its MPs defied both Mr Cameron 's pleas and a three-line whip to support the motion .